Fix a crash on startup with i830+ systems due to failure to follow an API
change that occurred.
 Install the xorg.conf referred to by xorg.conf(5). Installation was
disabled during the XF86 name avoidance phase, but could still be of use.
 Add a section about the Composite extension to xorg.conf.
 Add MakeDllModules YES to the WITH_DEBUG flag's options. While it won't
package correctly, you can't actually debug modules (where crashes almost always
happen) without it.
 Merge fixes from XORG-6_8-branch for i810 driver crashes in on CloseScreen,
ringbuffer lockups, and various warnings.
 Recognize R_ALPHA_SREL32 relocation type in elfloader.
PR:  ports/75425
Submitted by:  Marc Silver, marcs at draenor dot org
 Frank J. Laszlo, laszlof at vonostingroup dot com
 Ken Stailey kstailey at yahoo dot com
 r1.4 of X.Org CVS.
Approved by: portmgr