DRI drivers are incompatible with the old libGL in XFree86, they have been
repocopied to graphics/xfree86-dri. Also note that with this commit the html
manpages are going away, and with it the runtime dependency on perl for the
imake port.
Release notes at: http://www.x.org/X11R6.8.1/RELNOTES.txt
Props to: kris (multiple cluster runs and sorting through logs)
lesi (fixing all the issues in those logs, and more)
