Fix the use of /usr/X386 to ${X11BASE}. Fix the pathname /usr/bin/chess
to /usr/games/chess.
XCircle.c:
Fix the comment after an ifdef to make it a real comment to silent gcc.
std.h:
Comment out a private definition of sys_errlist.
I know that many of these entries are bogus and need to be revisited,
but let's get the tree working again for now and then do a pass through
looking at all the __FreeBSD__ entries, shall we?