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:
These conflict with with libfwbuilder21 and fwbuilder21 because
of the lib/libfw{builder,compiler}.{a,la.so} files.

Log message:
Fixed "test ==" and pkglint warnings.

Log message:
Added "c" to USE_LANGUAGES for packages that use GNU configure scripts,
since they always need a C compiler, even when the source code is
completely in C++.

For some other packages, stated in the comment that a C compiler is
really not needed.

Log message:
Update libfwbuilder and fwbuilder to 2.0.12.  Bugfixes only.

2.0.12:
Bugs fixed in this release:
bug #1455772: Implement more portable fix for converting UTF-8 in
comments. The previous one broke the Windows installer.

2.0.11:
Bugs fixed in this release:
* fixes to make code compile with g++ 4.1.
* bug #1455772: Properly convert comments to/from UTF-8 to ensure the
script is not corrupted when copied to the firewall
* bug #1455748: "make firewall script executable".

Bugs fixed in policy compiler for iptables:
* bug #1375432: avoid using '-m state' twice for stateless rules with
with custom services.
* bug#1364060: change shell pattern to match names of conntrack modules
in Linux 2.6.

Bugs fixed in policy compiler for ipfilter:
* bug #1386226: removed nat.conf when nat rules are removed.
* bug #1393004: use 'egrep -s' on Solaris.

Log message:
Change the format of BUILDLINK_ORDER to contain depth information as well,
and add a new helper target and script, "show-buildlink3", that outputs
a listing of the buildlink3.mk files included as well as the depth at
which they are included.

For example, "make show-buildlink3" in fonts/Xft2 displays:

	zlib
	fontconfig
	    iconv
	    zlib
	    freetype2
	    expat
	freetype2
	Xrender
	    renderproto

Log message:
Track information in a new variable BUILDLINK_ORDER that informs us
of the order in which buildlink3.mk files are (recursively) included
by a package Makefile.

Log message:
Bump BUILDLINK_ABI_DEPENDS.png and PKGREVISION for png-1.2.9nb2 update.

Log message:
Aligned the last line of the buildlink3.mk files with the first line, so
that they look nicer.

Log message:
Over 1200 files touched but no revisions bumped :)

RECOMMENDED is removed. It becomes ABI_DEPENDS.

BUILDLINK_RECOMMENDED.foo becomes BUILDLINK_ABI_DEPENDS.foo.

BUILDLINK_DEPENDS.foo becomes BUILDLINK_API_DEPENDS.foo.

BUILDLINK_DEPENDS does not change.

IGNORE_RECOMMENDED (which defaulted to "no") becomes USE_ABI_DEPENDS
which defaults to "yes".

Added to obsolete.mk checking for IGNORE_RECOMMENDED.

I did not manually go through and fix any aesthetic tab/spacing issues.

I have tested the above patch on DragonFly building and packaging
subversion and pkglint and their many dependencies.

I have also tested USE_ABI_DEPENDS=no on my NetBSD workstation (where I
have used IGNORE_RECOMMENDED for a long time). I have been an active user
of IGNORE_RECOMMENDED since it was available.

As suggested, I removed the documentation sentences suggesting bumping for
"security" issues.

As discussed on tech-pkg.

I will commit to revbump, pkglint, pkg_install, createbuildlink separately.

Note that if you use wip, it will fail!  I will commit to pkgsrc-wip
later (within day).