Log message:
Simply and speed up buildlink3.mk files and processing.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.

Log message:
Changes 2.0.6:
* Fixed some spurious rebuilds of plists, and framework headers.
* Added the -enable-absolute-install-paths option for Darwin systems.
* Install GNUstep.conf in /etc/GNUstep/GNUstep.conf on all systems.

Log message:
Changes 2.0.5:
* Bug fixes

Log message:
Bump revision for previous.

Log message:
Honour PKG_SYSCONFDIR. From Louis Guillaume on pkgsrc-users@

Log message:
Add commented out LICENSE line.

Log message:
Changes 2.0.2:
Update license to GPLv3. Bug fixes.

Changes 2.0.1:
Bug fixes in filesystem layout and framework installation.

Log message:
Honor PKG_SYSCONFDIR.

Log message:
No need for X11. Bump revision.

Log message:
MAKEFILE => MAKE_FILE.

XXX Can the other MAKEFILE changes to gnustep users go away now?