Sync with xorg-server: Fix typo in comment.

Cherry-pick Xorg version independent changes from xorg-server.

Normalize #include paths.
Call LogInit() for logging to /var/log/X68k.%s.log as Xorg and Xsun servers.
Fix a suspicious chunk disabled on xfree 4.x migration as sunKbd.c does.
Restore video mode properly on exit even on CRT Mode 19 (640x480 31kHz VGA).
Add ModeDef for 640x480x4bit PseudoColor.
Avoid a use of __UNVOLATILE(3).
Remove unnecessary pointer casts from malloc(3).
Use exact-width interger types properly for register accesses etc.

initial import of existing netbsd xorg-server 1.10 sources in the
xorg-server.old subdir.