With directory layout differences between Red Hat, Debian, Suse and
other distros one needs to set the variables for the elements below

-----------------+------------------+---------------+----------------+
                 | Red Hat          |  Debian       |  Suse          |
-----------------+------------------+---------------+----------------+
CONFIG_LEAF_DIR  | sysconfig        | default       | sysconfig      |
SUBSYS_DIR       | /var/run/subsys  | /var/run      | /var/run       |
INITD_DIR        | /etc/rc.d/init.d | /etc/init.d   | /etc/init.d    |
-----------------+------------------+---------------+----------------+

The existence of these directories are tested at build-time (on the
build host, via the "setvar_dir" macro in Config.mk) and for some
scripts at run-time.  If the Red Hat directory exists, it is used;
otherwise the Debian one is used.

You can override this by setting the variables in the environment or
your ".config" (which is included by .config).

To add support for new distributions that don't use the above locations,
one must grep for the above elements and add appropriate checks.

For example if a new distro uses /etc/bork as its config dir, it's not
sufficient to set CONFIG_LEAF_DIR=bork; one must also add tests for the
existance of the bork dir in every context where config files are read.


