1.) Update list to remove duplicates and add missing entries for recent
versions of NetBSD-current. The necessary changes were supplied
by Bernd Ernesti.
2.) Include the operating system version number in the package version
to force a re-build of the package if the operating system is
updated (which might change the X11 distribution as well.
This should fix PR pkg/42492.
Change approved by Thomas Klausner.
X.Org found in NetBSD-current.
Thanks a lot to all who helped, especially Matthias Scheler who did
repeated tests on Mac OS X and older versions of NetBSD to make sure the
support for those platforms wouldn't be broken (or at least, not fatally,
as I would still expect a few hiccups here and there, because there is
only so much one can test in such limited time).
On the infrastructure side, this branch brings pkgconfig-builtin.mk, in
order to write very easily new builtin.mk files. It can actually handle
more than just pkgconfig files, but it will provide a version if it finds
such a file. x11.builtin.mk has also been made more useful and now all
existing (and future!) native-X11-related builtin.mk files should include
it.
