* Move some MesaLib files from files/xorg to files/xfree.MesaLib,
or unwanted MesaLib may be buildlinked (and result in build failure).
* Add some files from OpenBSD-5.0.
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.
