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ChangeLog for Privoxy
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*** Version 3.0.17 Stable ***

- Fixed last-chunk-detection for responses where the content was small
  enough to be read with the body, causing Privoxy to wait for the
  end of the content until the server closed the connection or the
  request timed out. Reported by "Karsten" in #3028326.
- Responses with status code 204 weren't properly detected as body-less
  like RFC2616 mandates. Like the previous bug, this caused Privoxy to
  wait for the end of the content until the server closed the connection
  or the request timed out. Fixes #3022042 and #3025553, reported by a
  user with no visible name. Most likely also fixes a bunch of other
  AJAX-related problem reports that got closed in the past due to
  insufficient information and lack of feedback.
- Fixed an ACL bug that made it impossible to build a blacklist.
  Usually the ACL directives are used in a whitelist, which worked
  as expected, but blacklisting is still useful for public proxies
  where one only needs to deny known abusers access.
- Added LOG_LEVEL_RECEIVED to log the not-yet-parsed data read from the
  network. This should make debugging various parsing issues a lot easier.
- The IPv6 code is enabled by default on Windows versions that support it.
  Patch submitted by oCameLo in #2942729.
- In mingw32 versions, the user.filter file is reachable through the
  GUI, just like default.filter is. Feature request 3040263.
- Added the configure option --enable-large-file-support to set a few
  defines that are required by platforms like GNU/Linux to support files
  larger then 2GB. Mainly interesting for users without proper logfile
  management.
- Logging with "debug 16" no longer stops at the first nul byte which is
  pretty useless. Non-printable characters are replaced with their hex value
  so the result can't span multiple lines making parsing them harder then
  necessary.
- Privoxy logs when reading an action, filter or trust file.
- Fixed incorrect regression test markup which caused a test in
  3.0.16 to fail while Privoxy itself was working correctly.
  While Privoxy accepts hide-referer, too, the action name is actually
  hide-referrer which is also the name used one the final results page,
  where the test expected the alias.

- CGI interface improvements:
  - In finish_http_response(), continue to add the 'Connection: close'
    header if the client connection will not be kept alive.
    Anonymously pointed out in #2987454.
  - Apostrophes in block messages no longer cause parse errors
    when the blocked page is viewed with JavaScript enabled.
    Reported by dg1727 in #3062296.
  - Fix a bunch of anchors that used underscores instead of dashes.
  - Allow to keep the client connection alive after crunching the previous request.
    Already opened server connections can be kept alive, too.
  - In cgi_show_url_info(), don't forget to prefix URLs that only contain
    http:// or https:// in the path. Fixes #2975765 reported by Adam Piggott.
  - Show the 404 CGI page if cgi_send_user_manual() is called while
    local user manual delivery is disabled.

- Action file improvements:
  - Enable user.filter by default. Suggested by David White in #3001830.
  - Block .sitestat.com/. Reported by johnd16 in #3002725.
  - Block .atemda.com/. Reported by johnd16 in #3002723.
  - Block js.adlink.net/. Reported by johnd16 in #3002720.
  - Block .analytics.yahoo.com/. Reported by johnd16 in #3002713.
  - Block sb.scorecardresearch.com, too. Reported by dg1727 in #2992652.
  - Fix problems noticed on Yahoo mail and news pages.
  - Remove the too broad yahoo section, only keeping the
    fast-redirects exception as discussed on ijbswa-devel@.
  - Don't block adesklets.sourceforge.net. Reported in #2974204.
  - Block chartbeat ping tracking. Reported in #2975895.
  - Tag CSS and image requests with cautious and medium settings, too.
  - Don't handle view.atdmt.com as image. It's used for click-throughs
    so users should be able to "go there anyway".
    Reported by Adam Piggott in #2975927.
  - Also let the refresh-tags filter remove invalid refresh tags where
    the 'url=' part is missing. Anonymously reported in #2986382.
    While at it, update the description to mention the fact that only
    refresh tags with refresh times above 9 seconds are covered.
  - javascript needs to be blocked with +handle-as-empty-document to
    work around Firefox bug 492459.  So move .js blockers from
    +block{Might be a web-bug.} -handle-as-empty-document to
    +block{Might be a web-bug.} +handle-as-empty-document.
  - ijbswa-Feature Requests-3006719 - Block 160x578 Banners.
  - Block another omniture tracking domain.
  - Added a range-requests tagger.
  - Added two sections to get Flickr's Ajax interface working with
    default pre-settings. If you change the configuration to block
    cookies by default, you'll need additional exceptions.
    Reported by Mathias Homann in #3101419 and by Patrick on ijbswa-users@.

- Documentation improvements:
  - Explicitly mention how to match all URLs.
  - Consistently recommend socks5 in the Tor FAQ entry and mention
    its advantage compared to socks4a. Reported by David in #2960129.
  - Slightly improve the explanation of why filtering may appear
    slower than it is.
  - Grammar fixes for the ACL section.
  - Fixed a link to the 'intercepting' entry and add another one.
  - Rename the 'Other' section to 'Mailing Lists' and reword it
    to make it clear that nobody is forced to use the trackers
  - Note that 'anonymously' posting on the trackers may not always
    be possible.
  - Suggest to enable debug 32768 when suspecting parsing problems.

- Privoxy-Log-Parser improvements:
  - Gather statistics for ressources, methods, and HTTP versions
    used by the client.
  - Also gather statistics for blocked and redirected requests.
  - Provide the percentage of keep-alive offers the client accepted.
  - Add a --url-statistics-threshold option.
  - Add a --host-statistics-threshold option to also gather
    statistics about how many request where made per host.
  - Fix a bug in handle_loglevel_header() where a 'scan: ' got lost.
  - Add a --shorten-thread-ids option to replace the thread id with
    a decimal number.
  - Accept and ignore: Looks like we got the last chunk together
    with the server headers. We better stop reading.
  - Accept and ignore: Continue hack in da house.
  - Accept and higlight: Rejecting connection from 10.0.0.2.
    Maximum number of connections reached.
  - Accept and highlight: Loading actions file: /usr/local/etc/privoxy/default.action
  - Accept and highlight: Loading filter file: /usr/local/etc/privoxy/default.filter
  - Accept and highlight: Killed all-caps Host header line: HOST: bestproxydb.com
  - Accept and highlight: Reducing expected bytes to 0. Marking
    the server socket tainted after throwing 4 bytes away.
  - Accept: Merged multiple header lines to: 'X-FORWARDED-PROTO: http X-HOST: 127.0.0.1'

- Code cleanups:
  - Remove the next member from the client_state struct. Only the main
    thread needs access to all client states so give it its own struct.
  - Garbage-collect request_contains_null_bytes().
  - Ditch redundant code in unload_configfile().
  - Ditch LogGetURLUnderCursor() which doesn't seem to be used anywhere.
  - In write_socket(), remove the write-only variable write_len in
    an ifdef __OS2__ block. Spotted by cppcheck.
  - In connect_to(), don't declare the variable 'flags' on OS/2 where
    it isn't used. Spotted by cppcheck.
  - Limit the scope of various variables. Spotted by cppcheck.
  - In add_to_iob(), turn an interestingly looking for loop into a
    boring while loop.
  - Code cleanup in preparation for external filters.
  - In listen_loop(), mention the socket on which we accepted the
    connection, not just the source IP address.
  - In write_socket(), also log the socket we're writing to.
  - In log_error(), assert that escaped characters get logged
    completely or not at all.
  - In log_error(), assert that ival and sval have reasonable values.
    There's no reason not to abort() if they don't.
  - Remove an incorrect cgi_error_unknown() call in a
    cannnot-happen-situation in send_crunch_response().
  - Clean up white-space in http_response definition and
    move the crunch_reason to the beginning.
  - Turn http_response.reason into an enum and rename it
    to http_response.crunch_reason.
  - Silence a 'gcc (Debian 4.3.2-1.1) 4.3.2' warning on i686 GNU/Linux.
  - Fix white-space in a log message in remove_chunked_transfer_coding().
    While at it, add a note that the message doesn't seem to
    be entirely correct and should be improved later on.

- GNUmakefile improvements:
  - Use $(SSH) instead of ssh, so one only needs to specify a username once.
  - Removed references to the action feedback thingy that hasn't been
    working for years.
  - Consistently use shell.sourceforge.net instead of shell.sf.net so
    one doesn't need to check server fingerprints twice.
  - Removed GNUisms in the webserver and webactions targets so they
    work with standard tar.

*** Version 3.0.16 Stable ***

- Added the config file option handle-as-empty-doc-returns-ok to
  work around Firefox bug #492459, which causes Firefox to hang
  if JavaScripts are blocked in certain situations. The option is
  enabled in the default config file.
- Added the config file option default-server-timeout to control the
  assumed default server timeout. Since Privoxy no longer returns
  an error message for connection resets on reused client connections,
  assuming larger server timeout values appears to actually work
  pretty well as long as connections aren't shared.
- Added optional support for FreeBSD's accf_http(9). Use the
  configure option --enable-accept-filter to enable it.
- Added fancier Privoxy icons for win32. Contributed by Jeff H.
- In daemon mode, fd 0, 1 and 2 are bound to /dev/null.
- Resolve localhost using whatever address family the operating
  system feels like. Previous betas would try to use IPv4 as this
  is what most users expect, but this didn't work reliably on
  GNU/Linux systems.
- In the action lists on CGI pages, actions and their parameters are
  no longer separated with a space. The action file parser doesn't
  actually allow this and will throw an invalid syntax error if actions
  and parameters in the action files are separated. Not adding the
  spaces means copy and pasting CGI output into the action files works.
- The default keep-alive timeout has been reduced to 5 seconds to work
  around hangs in clients that treat the proxy like any other host and
  stop allowing any new connections if the "maximum number of
  connections per host" is reached.
- Several webbug URLs that look like they are leading to images are now
  blocked as image instead of empty documents. Doing the latter causes
  WebKit-based clients to show a "missing image" icon which may mess up
  the layout.
- The no-such-domain template is used for DNS resolution
  problems with FEATURE_IPV6_SUPPORT enabled. Previously the
  connect-failed template was used. Reported by 'zebul666'.
- Accepts quoted expiration dates even though RFC 2109 10.1.2
  doesn't seem to allow them. Reported anonymously.
- Don't try to forget connections if connection sharing is disabled.
  This wasn't a real problem but caused an unnecessary log message.
- The still undocumented --enable-extended-host-patterns configure
  option has a better description.
- Fixed an error message that would claim a write to the server
  failed when actually writing to the client failed.
- Log the crunch reason before trying to write to the client.
  The log is easier to read that way.
- Several log messages about client connections also mention
  the socket number.
- handle-as-empty-document no longer depends on the image blocking
  code being enabled.
- Privoxy-Log-Parser is roughly 40% faster in highlighting mode.
- uagen, a Firefox User-Agent generator for Privoxy and Mozilla
  browsers has been imported and is available in the tarball's
  tools directory.
- The scripts in the tools directory treat unknown parameters
  as fatal errors.

*** Version 3.0.15 Beta ***

- In case of missing server data, no error message is send to the
  client if the request arrived on a reused connection. The client
  is then supposed to silently retry the request without bothering
  the user. This should significantly reduce the frequency of the
  "No server or forwarder data received" error message many users
  reported.
- More reliable detection of prematurely closed client sockets
  with keep-alive enabled.
- FEATURE_CONNECTION_KEEP_ALIVE is decoupled from
  FEATURE_CONNECTION_SHARING and now available on
  all platforms.
- Improved handling of POST requests on reused connections.
  Should fix problems with stalled connections after submitting
  form data with some browser configurations.
- Fixed various latency calculation issues.
- Allows the client to pass NTLM authentication requests to a
  forwarding proxy. This was already assumed and hinted to work
  in 3.0.13 beta but actually didn't. Now it's confirmed to work
  with IE, Firefox and Chrome.
  Thanks to Francois Botha and Wan-Teh Chang
- Fixed a calculation problem if receiving the server headers
  takes more than two reads, that could cause Privoxy to terminate
  the connection prematurely. Reported by Oliver.
- Compiles again on platforms such as OpenBSD and systems
  using earlier glibc version that don't support AI_ADDRCONFIG.
  Anonymously submitted in #2872591.
- A bunch of MS VC project files and Suse and Redhat RPM spec
  files have been removed as they were no longer maintained for
  quite some time.
- Overly long action lines are properly rejected with a proper
  error message. Previously they would be either rejected as
  invalid or cause a core dump through abort().
- Already timed-out connections are no longer temporarily remembered.
  They weren't reused anyway, but wasted a socket slot.
- len refers to the number of bytes actually read which might
  differ from the ones received. Adjust log messages accordingly.
- The optional JavaScript on the CGI page uses encodeURIComponent()
  instead of escape() which doesn't encode all characters that matter.
  Anonymously reported in #2832722.
- Fix gcc45 warnings in decompress_iob().
- Various log message improvements.
- Privoxy-Regression-Test supports redirect tests.
- Privoxy-Log-Parser can gather some connection statistics.

*** Version 3.0.14 Beta ***

- The latency is taken into account when evaluating whether or not to
  reuse a connection. This should significantly reduce the number of
  connections problems several users reported.
- If the server doesn't specify how long the connection stays alive,
  Privoxy errs on the safe side of caution and assumes it's only a second.
- The error pages for connection timeouts or missing server data use a
  Last-Modified date in the past. Retry attempts are detected and Privoxy
  removes the If-Modified-Since header to prevent the server from responding
  with status code 304 in which case the client would reuse the error message.
- Setting keep-alive-timeout to 0 disables keep-alive support. Previously
  Privoxy would claim to allow persistence but not reuse the connection.
- Pipelined requests are less likely to be mistaken for the request
  body of the previous request. Note that Privoxy still has no real
  pipeline support and will either serialize pipelined requests or
  drop them in which case the client has to resent them.
- Fixed a crash on some Windows versions when header randomization
  is enabled and the date couldn't be parsed.
- Privoxy's keep-alive timeout for the current connection is reduced
  to the one specified in the client's Keep-Alive header.
- For HTTP/1.1 requests, Privoxy implies keep-alive support by not
  setting any Connection header instead of using 'Connection: keep-alive'.
- If the socket isn't reusable, Privoxy doesn't temporarily waste
  a socket slot to remember the connection.
- If keep-alive support is disabled but compiled in, the client's
  Keep-Alive header is removed.
- Fixed a bug on mingw32 where downloading large files failed if
  keep-alive support was enabled.
- Fixed a bug that (at least theoretically) could cause log
  timestamps to be occasionally off by about a second.
- No Proxy-Connection header if added if there already is one.
- The configure script respects the $PATH variable when searching
  for groups and id.

*** Version 3.0.13 Beta ***

- Added IPv6 support. Thanks to Petr Pisar who not only provided
  the initial patch but also helped a lot with the integration.
- Added client-side keep-alive support.
- The connection sharing code is only used if the connection-sharing
  option is enabled.
- The max-client-connections option has been added to restrict
  the number of client connections below a value enforced by
  the operating system.
- Fixed a regression reintroduced in 3.0.12 that could cause
  crashes on mingw32 if header date randomization was enabled.
- Compressed content with extra fields couldn't be decompressed
  and would get passed to the client unfiltered. This problem
  has only be detected through statical analysis with clang as
  nobody seems to be using extra fields anyway.
- If the server resets the Connection after sending only the headers
  Privoxy forwards what it got to the client. Previously Privoxy
  would deliver an error message instead.
- Error messages in case of connection timeouts use the right
  HTTP status code.
- If spawning a child to handle a request fails, the client
  gets an error message and Privoxy continues to listen for
  new requests right away.
- The error messages in case of server-connection timeouts or
  prematurely closed server connections are now template-based.
- If zlib support isn't compiled in, Privoxy no longer tries to
  filter compressed content unless explicitly asked to do so.
- In case of connections that are denied based on ACL directives,
  the memory used for the client IP is no longer leaked.
- Fixed another small memory leak if the client request times out
  while waiting for client headers other than the request line.
- The client socket is kept open until the server socket has
  been marked as unused. This should increase the chances that
  the still-open connection will be reused for the client's next
  request to the same destination. Note that this only matters
  if connection-sharing is enabled.
- A TODO list has been added to the source tarball to give potential
  volunteers a better idea of what the current goals are. Donations
  are still welcome too: http://www.privoxy.org/faq/general.html#DONATE

*** Version 3.0.12 ***

- The socket-timeout option now also works on platforms whose
  select() implementation modifies the timeout structure.
  Previously the timeout was triggered even if the connection
  didn't stall. Reported by cyberpatrol.
- The Connection: keep-alive code properly deals with files
  larger than 2GB. Previously the connection was closed too
  early.
- The content length for files above 2GB is logged correctly.
- The user-manual directive on the show-status page links to
  the documentation location specified with the directive,
  not to the Privoxy website.
- When running in daemon mode, Privoxy doesn't log anything
  to the console unless there are errors before the logfile
  has been opened.
- The show-status page prints warnings about invalid directives
  on the same line as the directives themselves.
- Fixed several justified (but harmless) compiler warnings,
  mostly on 64 bit platforms.
- The mingw32 version explicitly requests the default charset
  to prevent display problems with some fonts available on more
  recent Windows versions. Patch by Burberry.
- The mingw32 version uses the Privoxy icon in the alt-tab
  windows. Patch by Burberry.
- The timestamp and the thread id is omitted in the "Fatal error"
  message box on mingw32.
- Fixed two related mingw32-only buffer overflows. Triggering
  them required control over the configuration file, therefore
  this isn't seen as a security issue.
- In verbose mode, or if the new option --show-skipped-tests
  is used, Privoxy-Regression-Test logs skipped tests and the
  skip reason.

*** Version 3.0.11 ***

- On most platforms, outgoing connections can be kept alive and
  reused if the server supports it. Whether or not this improves
  things depends on the connection.
- When dropping privileges, membership in supplementary groups
  is given up as well. Not doing that can lead to Privoxy running
  with more rights than necessary and violates the principle of
  least privilege. Users of the --user option are advised to update.
  Thanks to Matthias Drochner for reporting the problem,
  providing the initial patch and testing the final version.
- Passing invalid users or groups with the --user option
  didn't lead to program exit. Regression introduced in 3.0.7.
- The match all section has been moved from default.action
  to a new file called match-all.action. As a result the
  default.action no longer needs to be touched by the user
  and can be safely overwritten by updates.
- The standard.action file has been removed. Its content
  is now part of the default.action file.
- In some situations the logged content length was slightly too low.
- Crunched requests are logged with their own log level.
  If you used "debug 1" in the past, you'll probably want
  to additionally enable "debug 1024", otherwise only passed
  requests will be logged. If you only care about crunched
  requests, simply replace "debug 1" with "debug 1024".
- The crunch reason has been moved to the beginning of the
  crunch message. For HTTP URLs, the protocol is logged as well.
- Log messages are shortened by printing the thread id on its
  own (as opposed to putting it inside the string "Privoxy()").
- The config option socket-timeout has been added to control
  the time Privoxy waits for data to arrive on a socket.
- Support for remote toggling is controlled by the configure
  option --disable-toggle only. In previous versions it also
  depended on the action editor and thus configuring with the
  --disable-editor option would disable remote toggling support
  as well.
- Requests with invalid HTTP versions are rejected.
- The template symbol @date@ can be used to include a date(1)-like
  time string. Initial patch submitted by Endre Szabo.
- Responses from shoutcast servers are accepted again.
  Problem reported and fix suggested by Stefan.
- The hide-forwarded-for-headers action has been replaced with
  the change-x-forwarded-for{} action which can also be used to
  add X-Forwarded-For headers. The latter functionality already
  existed in Privoxy versions prior to 3.0.7 but has been removed
  as it was often used unintentionally (by not using the
  hide-forwarded-for-headers action).
- A "clear log" view option was added to the mingw32 version
  to clear out all of the lines in the Privoxy log window.
  Based on a patch submitted by T Ford.
- The mingw32 version uses "critical sections" now, which prevents
  log message corruption under load. As a side effect, the
  "no thread-safe PRNG" warning could be removed as well.
- The mingw32 version's task bar icon is crossed out and
  the color changed to gray if Privoxy is toggled off.

*** Version 3.0.10 ***

- Ordinary configuration file changes no longer cause program
  termination on OS/2 if the name of the logfile hasn't been
  changed as well. This regression probably crept in with the
  logging improvements in 3.0.7. Reported by Maynard.
- The img-reorder filter is less likely to mess up JavaScript code in
  img tags. Problem and solution reported by Glenn Washburn in #2014552.
- The source tar ball now includes Privoxy-Log-Parser,
  a syntax-highlighter for Privoxy logs. For fancy screenshots see:
  http://www.fabiankeil.de/sourcecode/privoxy-log-parser/
  Documentation is available through perldoc(1).

*** Version 3.0.9 Beta ***

- Added SOCKS5 support (with address resolution done by
  the SOCKS5 server). Patch provided by Eric M. Hopper.
- The "blocked" CGI pages include a block reason that was
  provided as argument to the last-applying block action.
- If enable-edit-actions is disabled (the default since 3.0.7 beta)
  the show-status page hides the edit buttons and explains why.
  Previously the user would get the "this feature has been disabled"
  message after using the edit button.
- Forbidden CONNECT requests are treated like blocks by default.
  The now-pointless treat-forbidden-connects-like-blocks action
  has been removed.
- Not enabling limit-connect now allows CONNECT requests to all ports.
  In previous versions it would only allow CONNECT requests to port 443.
  Use +limit-connect{443} if you think you need the old default behaviour.
- The CGI editor gets turned off after three edit requests with invalid
  file modification timestamps. This makes life harder for attackers
  who can leverage browser bugs to send fake Referers and intend to
  brute-force edit URLs.
- Action settings for multiple patterns in the same section are
  shared in memory. As a result these sections take up less space
  (and are loaded slightly faster). Problem reported by Franz Schwartau.
- Linear white space in HTTP headers will be normalized to single
  spaces before parsing the header's content, headers split across
  multiple lines get merged first. This should prevent problems like:
   * letting the session-cookies-only action slip
     some Cookies through unmodified,
   * only suppressing the first line of a header,
     thus creating an invalid one, and
   * to incorrectly block headers with valid timestamps
     that weren't properly recognized.
  Headers that could trigger these problems are unlikely to appear
  in "normal" web traffic, but could be intentionally generated to
  fool some of Privoxy's header parsers.
- Host information is gathered outside the main thread so it's less
  likely to delay other incoming connections if the host is misconfigured.
- New config option "hostname" to use a hostname other than
  the one returned by the operating system. Useful to speed-up responses
  for CGI requests on misconfigured systems. Requested by Max Khon.
- The CGI editor supports the "disable all filters of this type"
  directives "-client-header-filter", "-server-header-filter",
  "-client-header-tagger" and "-server-header-tagger".
- Fixed false-positives with the link-by-url filter and URLs that
  contain the pattern "/jump/".
- The less-download-windows filter no longer messes
  "Content-Type: application/x-shockwave-flash" headers up.
- In the show-url-info page's "Final results" section active and
  inactive actions are listed separately. Patch provided by Lee.
- The GNUmakefile supports the DESTDIR variable. Patch for
  the install target submitted by Radoslaw Zielinski.
- Embedding the content of configuration files in the show-status
  page is significantly faster now. For a largish action file (1 MB)
  a speedup of about 2450 times has been measured. This is mostly
  interesting if you are using large action files or regularly use
  Privoxy-Regression-Test while running Privoxy through Valgrind,
  for stock configuration files it doesn't really matter.
- If zlib support is unavailable and there are content
  filters active but the prevent-compression action is disabled,
  the show-url-info page includes a warning that compression
  might prevent filtering.
- The show-url-info page provides an OpenSearch Description that
  allows to access the page through browser search plugins.
- Custom client-header filters that rewrite the request line
  incorrectly no longer cause Privoxy to crash. Reported by din_a4.
- The obsolete kill-popups action has been removed as the
  PCRS-based popup filters can do the same and are slightly
  less unreliable.
- The inspect-jpegs action has been removed.
- The send-wafer and send-vanilla-wafer actions have been removed.
  They weren't particular useful and their behaviour could be emulated
  with add-header anyway.
- Privoxy-Regression-Test has been significantly improved.
- Most sections in the default.action file contain tests for
  Privoxy-Regression-Test to verify that they are working as intended.
- Parts of Privoxy have been refactored to increase maintainability.
- Building with zlib (if available) is done by default.

*** Version 3.0.8 ***

- Fixed a small memory leak when listen-address only specifies the port.
- The source tar balls now include Privoxy-Regression-Test which
  (upon other things) can be used to automatically detect some
  packaging problems. Packagers are welcome to give it a try.
- Reverted a change in 3.0.7 that caused path patterns to be checked
  even if the host pattern match already failed. While this doesn't
  noticeable affect the performance, it makes it less likely to run
  out of stack space with overly-complex path patterns the user might
  have added.
- Updated the msn, yahoo and google filters to work as advertised again.
- The warning message shown by the show-status CGI page is easier to
  understand. Previously it wasn't clear that the error message
  is shown below the invalid directive. (Reported by Lee)
- When regenerating Content-Disposition headers the more common
  spelling is used for the name. Previously it was written without caps.
- Less confusing log message if the content type isn't overwritten
  because force-text-type wasn't used but the old type doesn't look
  like content that would be filtered normally.
- Better log messages if the user tries to execute filters that
  don't exist.
- Treat the non-standard Request-Range headers like standard range
  headers and suppress them if content filtering is enabled.
- Prevent the log messages for CONNECT requests to unacceptable
  ports from printing the limit-connect argument as [null] if
  limit-connect hasn't been explicitly enabled.
- Don't disable the mingw32 log window if the logfile directive
  isn't used. While it was an intentional change in 3.0.7 at least
  one user perceived it as a regression and the same effect can
  be achieved by disabling all debug directives.
- Fixed two minor problems related to the win32 build process: a css
  file was not being in the installer and the trustfile comment in the
  config.txt referenced a nonexisting file
- Minor documentation fixes.

*** Version 3.0.7 Beta ***

- Added zlib support to filter content with gzip and deflate
  encoding. (Patch provided by Wil Mahan)
- Dedicated filters and actions are used for header filtering.
  "filter-client-headers" and "filter-client-headers" are no longer
  supported, use server-header-filter{} and client-header-filter{}
  instead.
- Tags can be used to change actions based on HTTP headers.
- New server-header filter: less-download-windows.
- New client-header taggers: css-requests, image-requests,
  client-ip-address, http-method, allow-post, complete-url,
  user-agent and privoxy-control.
- New server-header taggers: content-type and privoxy-control.
- The forward-override{} action allows to change the forwarding
  settings through the action files, for example based on client
  headers like the User-Agent, or the request origin.
- Socks errors are no longer handled by the CGI page for
  DNS resolution failures.
- CGI pages use favicons to signal whether they are error
  or control pages. This is useful if you rely heavily on
  browser tabs.
- The show-url-info CGI page shows the forwarding settings.
- "Crunch!" log messages (used when Privoxy answers requests
  by itself) now also contain the reason.
- Allow to rewrite the request destination behind the client's back.
- Fix socks requests on big-endian platforms. Patch provided by Song Weijia.
- Fixes possible deadlocks and crashes on OpenBSD.
  Patch provided by Ralf Horstmann.
- The CGI action editor allows to edit actionfiles with previously
  forbidden characters like dots.
- New trust entries are saved with a comment that contains the
  trusted referring URL (Suggested by Daniel Griscom).
- Filter descriptions are HTML encoded automatically.
- New config option "split-large-forms" to work
  around a browser bug that caused IE6 and IE7 to ignore
  the Submit button on the edit-actions-for-url CGI page.
- New config option "allow-cgi-request-crunching" to allow
  requests for Privoxy's CGI pages to be blocked, redirected
  or (un)trusted like ordinary requests.
- Empty filter files no longer interrupt the filtering process
  prematurely and are correctly listed on the show-status CGI page.
- New config option "accept-intercepted-requests" to combine
  Privoxy with any packet filter to build an intercepting proxy
  for HTTP/1.1 requests (and for HTTP/1.0 requests with Host header set).
- fast-redirects{} catch redirects to https URLs as well.
- redirect{s@foo@bar@} can be used to redirect to a rewritten
  version of the original URL.
- Trap unsupported gopher proxy requests.
- Fixed a bug in the User Manual delivery on Windows
  (mingw32 only). Images now show up correctly and HTML
  pages are no longer padded with garbage data.
- Fixed several minor memory leaks, most of them discovered with Valgrind.
- Only unlink the pidfile if it's actually used.
- Retries after connection problems with forced requests
  aren't blocked again.
- On Unix SIGABRT causes a core dump as expected and is no
  longer treated as normal shutdown signal.
- The "access denied" CGI page is more descriptive and
  allows retries to circumvent the referrer check.
- Updated PCRS to handle unexpected PCRE errors properly.
  Fixed crashes that could occur if Privoxy was build
  with external PCRE versions newer than Privoxy's internal
  one. (Reported by Chung-chieh Shan)
- Fixed crashes with null bytes in PCRS replacement strings
  (Patch provided by Felix Gröbert).
- Fixed crashes with header time randomization on mingw32.
- The CGI style sheet is no longer delivered if the referring
  page isn't a Privoxy CGI page. This prevents a JavaScript-based
  Privoxy detection "attack". Note that detecting Privoxy is
  still possible through other ways and Privoxy was never intended
  to be invisible anyway.
- Added support for AmigaOS 4, fixed build for AmigaOS 3.x.
- The show-url-info CGI page displays a warning if Privoxy
  is currently toggled off.
- The show-status CGI page suppresses the edit button
  for action files if Privoxy has no write access.
- Most CGI error pages react properly to HEAD requests.
- Requests with RFC 3253 HTTP methods (used by Subversion)
  are accepted. (Patch provided by Petr Kadlec)
- New config option "templdir" to change the location
  of the CGI templates to make sure customized templates
  aren't "updated".
- Better handling of "HTTP/1.1 100 Continue" responses.
- The background of the PNG pattern is transparent.
- Fixed XML syntax errors caused by banners-by-size and banners-by-url.
- Fixed crashes and possible action file corruptions
  when lines containing hashes are written through the CGI editor.
- Supports dynamic filters which can contain variables.
- Supports tags to change the actions based on client or server headers.
- Incorrect actions are logged before program termination.
- The "actionsfile" syntax in the configuration file is consistent
  with the rest of the configuration options and requires the
  whole file name. This is an incompatible change, if you use
  an old configuration file you might have to append ".action"
  to your "actionsfile" directives.
- With the configuration file option "enforce-blocks" the
  "go there anyway" mechanism can be disabled without recompiling
  Privoxy.
- More precise error messages in case of incorrect acl syntax.
- Logs a warning if filtering is enabled but impossible due
  to lack of zlib support or use of the prevent-compression action.
- Less noisy handling of Cookie:" and "Connection:" headers.
- Improved error messages in case of connection problems.
- Fix a command-line-parsing bug that was introduced before 3.0.5
  beta and caused Privoxy to treat the last argument as configuration
  file if no configuration file was specified.
- Treat unknown command line options as fatal errors instead
  of silently ignoring them.
- Use string functions with length checks more often.
- Don't log CONNECT requests twice.
- Allow to log the source address for ACL-related connection drops.
- Don't ignore applying filters if the server didn't
  specify a Content-Type. Bug reported by Amuro Namie.
- Rejected CONNECT requests are logged with log level info
  (enabled by default) and the reason for the block.
- New command line option "--pre-chroot-nslookup hostname" to
  intialize the resolver library before chroot'ing. On some systems this
  reduces the number of files that must be copied into the chroot tree.
  (Patch provided by Stephen Gildea)
- Fix a long-standing memory corruption bug that could cause
  Privoxy to overwrite a single byte in memory it didn't explicitly
  allocate (but that probably was allocated anyway due to bucket size).
- Send template-based CGI pages as HTTP/1.1 unless the client
  asked for HTTP/1.0.
- Let the first line in connection established responses
  end in \r\n as required by RFC1945. Reported by Bert van Leeuwen.
- If no log file has been specified, disable logging instead of logging
  to stderr.
- Don't block stderr when in daemon mode.
- Ignore missing zero-chunks when filtering chunk-encoded content.
  Earlier Privoxy versions would buffer and then forward the content
  unmodified which caused some browsers to simply show empty pages.
- Fix double free in cgi_edit_actions_list(). Reported by Venustech AD-LAB.
- The code to add X-Forwarded-For headers when the hide-forwarded-for-headers
  action isn't being used has been removed.
- Fixed trustfile feature which previously didn't work without FEATURE_TOGGLE.
  Reported by Lee.
- Minor code clean-ups, filter and action file updates.
  (Some of them reported by Davide Alberani, Markus Elfring,
   Stefan Huehner and Adam Piggott)

*** Version 3.0.6 ***

- New content filters: no-ping, google, msn, yahoo and blogspot.
- New header filters:  x-httpd-php-to-html, html-to-xml, xml-to-html
                       and hide-tor-exit-notation.
- The special header "X-Filter: No" now disables header filtering as well.
- Improved the filters img-reorder, js-annoyances, webbugs,
  banners-by-size, banners-by-link and ie-exploits to make them
  less likely to break anything.
- Removed outdated URL patterns in default.action and added new ones.
- Added redirection from http://p.p/user-manual to http://p.p/user-manual/
- Changed webinterface default values for hide-user-agent, hide-referrer
  and set-image-blocker.

*** Version 3.0.5 Beta ***

- Windows version can be installed/started as a service.
- Windows icon stays blue when Privoxy is idle, green when busy.
- Integrated Fabian Keil's extensive patch.  See:
  http://www.fabiankeil.de/sourcecode/privoxy/. Includes the
  following new or significantly improved actions (among many
  other improvements):

     content-type-overwrite{}
     crunch-client-header{string}
     crunch-if-none-match
     crunch-server-header{string}
     fast-redirects{check-decoded-url}
     filter-client-headers
     filter-server-headers
     force-text-mode
     handle-as-empty-document
     hide-accept-language{}
     hide-content-disposition{}
     hide-if-modified-since
     hide-referrer{conditional-block}
     overwrite-last-modified{}
     redirect{URL}
     treat-forbidden-connects-like-blocks

- Standard-compliant clients are prevented from displaying cached
  copies of Privoxy's error messages after the cause of the problem
  has gone.
- Improved DNS error handling.
- Multiple filter files can now be specified in config.
- Added jpeg filtering to defend against MS jpeg vulnerability MS04-028
  with the new inspect-jpegs action.
- Removed the "arbitrary" 1000 filter limit - addresses tracker #911950
- Thanks to Jindrich Makovicka for a race condition fix for the log
  file.  The race condition remains for non-pthread implementations.
  Reference patch #1175720. Various other logging enhancements.
- A pile of assorted bug fixes, memory leaks, enhancements, etc.
- Moved Actions file reporting mechanism to SF tracker.
- Two new options for config: enable-remote-http-toggle and
  forwarded-connect-retries.
- Trap unsupported FTP requests.
- Let text/xml be filtered.
- Numerous updates to default.action
- Increase the compiled in limit of trusted referrers from 64 to 512
  (for trustfile users).

*** Version 3.0.3 ***

- Fixed yet another two memory leaks. Process growth seems stopped now.
- Further tightened security against malicious toggle-off links.
- Excluded text/plain MIME types from filtering. This fixes a
  couple of client-crashing, download corruption and
  Privoxy performance issues, whose root cause lies in
  web servers labelling content of unknown type as text/plain.
- Assorted fixes for POSIX compliance, signal handling, graceful
  termination, compiler warnings, OSX support, Win32 systray,
  error logging, hostname wildcards, correct detection of NetBSD.
- Workarounds for client (iTunes etc) and server (PHP < 4.2.3) bugs
  including the notorious "blank page" problem.
- Various filter improvements; most notably the unsolicited-popups
  filter became less destructive
- Major revamp of the actions file

*** Version 3.0.2 ***

- Fixed two memory leaks, one serious
- Fixed bug in pcrs which could cause crashes with user-defined filters
- Fixed bug in domain name matching
- Assorted small fixes (Win32 menu, CGI URL editor, ..)
- Added basic support for the OPTIONS and TRACE http methods
- Added workaround for Bug in Mac OSX that made Privoxy crash occasionally
- Refined the default action file through >400 items of user feedback
- Filter changes:
  - Assorted refinements, optimizations and fixes in the js-annoyances,
    img-reorder, banners-by-size, banners-by-link, webbugs, refresh-tags,
    html-annoyances, content-cookies and fun filters
  - Replaced filter "popups" by choice between two modes:
    - "unsolicited-popups" tries to catch only the unsolicited ones
    - "all-popups" tries to kill them all (as before)
  - New filter "tiny-textforms" Help those tiny or hard-wrap textareas.
  - New filter "jumping-windows" that prevents windows from resizing
    and moving themselves
  - New filter "demoronizer" which fixes MS's abuse of std charsets
    (common cases anyway).
  - Replaced "nimda" with more general "ie-exploits" filter in which
    all filters for exploits shall be collected
- Improved cookie logging
- Rewrote make install target. Added uninstall and install-strip
  targets.
- Fixed a potential (application-level, NOT OS-level!) security
  problem involving remote toggling and action file manipulation
  by mailicious websites.
- Added ability to chroot (thanks to Sviatoslav Sviridov)
- Added more action aliases for prehistoric action names
- Add Slackware support to Makefile.

*** Version 3.0  ***

- Fixed Windows startmenu items, log window and tray icon menus.
- Added warning for bogus install target
- Added quicktime-kioskmode filter and improved frameset-borders
- Updated default.action based on latest feedback
- New PDF doc build process
- Add a user contrib module to cvs:
  http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/ijbswa/contrib/

*** Version 2.9.18  ***

- Added workaround for IE bug that broke CGI interface
- Bugfix: String actions now reliably editable through CGI interface
- Three filters fixed (again!)
- Assorted small fixes and doc enhancements

*** Version 2.9.16  ***

- Major revamp of default.action to get rid of years of cruft.
- Same for default.filter
- Re-design and major improvements to the CGI editor interface.
- Address spurious 'out of memory' error due to incorrect file permissions.
- Impose buffer limits while reading client and server headers.
- Better memory and CPU optimization.
- Add Conectiva Linux package.
- user-manual directive added to config for help links from within CGI
  editor.
- Multiple actions files can now be specified in config.
- Actions files are changed to: default.action, standard.action, and
  user.action. user.action is for personal/local configuration.
- The usual many small and miscellaneous bug and security fixes.

*** Version 2.9.14 Beta ***

- Fix Solaris compile problem (gateway.h and filters.h)
- Makefile fixes for Solaris, FreeBSD (?)
- Fix build failure where certain features were disabled.
- 'blocked-compact' template is removed. Various CGI improvements,
  including an adaptive 'blocked' template.
- Various tweaks for actions file to get ready for stable 3.0
- Included a 'Bookmarklet' and PHP scripts for reporting actions file
  problems via web interface at privoxy.org. Accessed via internal CGIs.
- Include cgi-style.css for templates.
- #include mechansim for common text in templates
- Various other minor fixes.

*** Version 2.9.13 Beta ***

- *NEWS*: The project has been renamed to Privoxy! The new name is
  reflected throughout (file locations, etc).
- ijb.action is now default.action. re_filterfile is now
  default.filter.
- http://i.j.b/ is now http://p.p/
- The 'logo' option for replacing ad iamges is removed now. 'Pattern'
  (checkerboard) is now the default.
- RPM spec file make over.


*** Version 2.9.12 Beta ***

- **READ**: The default listening PORT is NOW 8118!!! Changed from
  8000 due to conflict with NAS (Network Audio Server, whatever that
  is.)
- More CGI actions editor fixes and improvements.
- Win32 command line fix ups.
- re_filterfile now has modular sections that can be activated on a
  per site basis. Some new goodies there too.
- +filter now takes arguments to match FILTER sections in re_filterfile
  for even more flexibility.
- Added a new image blocker option: +image-blocker{pattern}, which
  displays a checkerboard patthern and scales better than the logo.
- PNG images will be used in place of GIF for JB built-in images
  if configured with --enable-no-gif.
- Clean up compiler warnings (mostly).
- Improved handling of failed DNS lookups & diagnostics for failed bind
  to listen socket
- Made --no-daemon mode log to tty instead of logfile.
- Various spec file and init script cleanups and improvements (Redhat and
  SuSE).
- CGI Editor works on OS/2 now.
- Fix restart failure where sockets were in TIME_WAIT.
- Fixes for actions cgi editor, make sure we have right file.
- A --pidfile command line option now, in addition to --help,
  --version, --no-daemon, --user and configfile. --no-daemon replaces
  the former -d option and _DEBUG define. --user will drop privileges
  to the specified user.
- Signal handling cleanups (*nix).
- CGI actions editor improvements and fixes.
- Error handling improvements, especially out of memory.
- Default re_filterfile fix that caused spurious IJB logos
  (instead of 'blank').
- configure.in threading fixes for Solaris.
- Various other minor fixes.


*** Version 2.9.11 Beta Changes ***

- Add "session" cookie concept where cookies exist for the life
  of that browser session only (ie never goes to disk).
- Checks for correct header length.
- Fix user:pass@host.domain.com auth bug.
- Better signal handling on *nix.
- Fix CFLAGS hard-coded in configure.in
- Fix threading bug re: gethostbyname() that caused random
  URLs to fail in some cases.


*** Version 2.9.11 Alpha Changes ***

- A web-based editor for the actions file is included (go to http://i.j.b/).
- Web-based toggle IJB on/off support.
- Cookie handling has changed - the new +no-cookies-keep feature is now the
default.
- actionsfile is renamed to ijb.action.
- junkbstr.txt is now config.txt on Win32.
- Support for running IJB as a UNIX daemon process has improved.
- Unix daemon now returns error code on failed start.
- Timestamps in logfile and jarfile now.
- Fix for the Netscape bug reintroduced in 2.9.9.
- make should now abort if gmake (GNU make) not present.
- Many other minor bugfixes
- Start a ChangeLog :)



*** Version 2.9.3 pre-Alpha Changes ***

- Amiga support (completely untested by me - I don't have an Amiga)
- "tinygif 3" support (redirects blocked images to a specified URL, so
the browser doesn't have to load and cache many copies of the same
image).
- one case where there were both local and global "referrer" variables
(yuck!) clarified by renaming the local one to "refer".
- Fixed some places where close() was used instead of close_socket().
Thanks to Jörg Strohmayer (joergs at users.sourceforge.net) for these.
- Temporary hack to get FORCE_LOAD to work with IE.  I just lowercased the
FORCE_LOAD_PREFIX.  Needs fixing properly.
- Most URLs hardcoded into Junkbuster were changed to go through a script
e.g. http://ijbswa.sourceforge.net/redirect.php?v=2.9.3&to=faq
The only other URLs left are the GNU GPL:
  http://www.fsf.org/copyleft/gpl.html
and the home page:
  http://ijbswa.sourceforge.net/
... and various URLs which will be intercepted by Junkbuster anyway.
TODO: Still need to do something with the URLs in Junkbuster Corp's
copyright/trademark notice on the bottom of the show-proxy-args page.
- PCRE or GNU Regex is now a #define option.


*** Version 2.9.2 pre-Alpha Changes ***

- Andreas applied the latest version of the FORCE patch.


*** Version 2.9.1 pre-Alpha Changes ***

- in parsers.c, fixed two #ifdef FORCE to #ifdef FORCE_LOAD
(BTW: I think FORCE is precise enough, since loading remote
data is the whole purpose of a proxy..)
- Set the FORCE_PREFIX (back) to 'IJB-FORCE-LOAD-'. While 'noijb.'
is more elegant and looks like a hostname in the URL, it doesn't
make clear to the inexperienced user that the proxy is bypassed. It
also has a higher name collision risk.
- Filled in the function header templates for my functions in
parsers.c (again). They obviously got lost in our current
patch war ;-)
- Cut the credit for the §-referrer-option from the config file,
that Stefan had placed there.
- Improved the re_filterfile


*** Version 2.9.0 pre-Alpha Changes ***

-  Now use PCRE, not GNU REGEX.  I have not yet had chance to check the
syntax of the block/image/cookie file to ensure that they match what
is expected - however they seem to work.
-  Replaced "configure" script with one generated by "autoconf".  Also
use a header "config.h" (was ijbconfig.h in my previous release) for
the #defines.  "config.h" is now generated with "autoheader" from
"acconfig.h" and "configure.in".  (Note that to install you do not
need autoconf or autoheader - just run "./configure".)
To see command-line options, run "./configure --help".
This is my first ever autoconf script, so it has some rough edges
(how PCRE is handled is the roughest).
-  Error logging code replaced with new module errlog.c, based on the
one from JunkbusterMT (but with the threading code removed).
-  Most of Rodney's 0.21 and 0.21A patches applied. (Marked *).  I did not
apply all of these, since I had already independently done conditional
popup file, conditional image file, and integration of popup code.
- ACL, Jar and trust files conditionally compiled.
- New source file headers.
- Various cosmetic changes.  (But I have not consistently ordered the
config files - I think that's worthwhile, but it's 1am and I want to
get this released!)
- RCS tags on .h files.
-  RCS tags are const char[] rather than const char *.  (Saves 4 bytes
per tag ;-)
- VC++ project files renamed to vc_junkbuster.*.
- show-proxy-args now shows status of all conditionals, not just REGEX
- Various functions moved around.  Most notably all the system-specific
sockets code which was spread between jcc.c, bind.c, and connect.c,
has been moved to "jbsockets.c".  The non-system-specific code from
connect.c and socks4.c has been movet to "gateway.c".  Also, the
config file loader and the global variables it writes to have been
moved to "loadcfg.c".  (Maybe this should go into loaders.c?)
And candidate for the "worst filename ever" award is "miscutil.c",
which contains, well, miscellaneous utility functions like zalloc.
(Suggestions for a better name for this file are welcome!)
- Loaders now use a common function to read a line and skip comments,
and this function also stores the proxy_args.
- Added ./junkbuster --help     (Not for Win32 GUI)
- Added ./junkbuster --version  (Not for Win32 GUI)
- Win32 resources are now all marked as "U.S. English", rather than
being a mix of "U.S. English", "U.K. English" and "Irish English".
- Version number changes to 2.9.0


----------------------------------------------------------------------
Copyright   :  Written by and Copyright (C) 2001-2010 the
               Privoxy team. http://www.privoxy.org/

               Based on the Internet Junkbuster originally written
               by and Copyright (C) 1997 Anonymous Coders and
               Junkbusters Corporation.  http://www.junkbusters.com/

               This program is free software; you can redistribute it
               and/or modify it under the terms of the GNU General
               Public License as published by the Free Software
               Foundation; either version 2 of the License, or (at
               your option) any later version.

               This program is distributed in the hope that it will
               be useful, but WITHOUT ANY WARRANTY; without even the
               implied warranty of MERCHANTABILITY or FITNESS FOR A
               PARTICULAR PURPOSE.  See the GNU General Public
               License for more details.

               The GNU General Public License should be included with
               this file.  If not, you can view it at
               http://www.gnu.org/copyleft/gpl.html
               or write to the Free Software Foundation, Inc., 59
               Temple Place - Suite 330, Boston, MA  02111-1307, USA.
