makedefs has been listing TIMED_DELAY as one of the options which
affects save file contents even though that hasn't been the case for
a long time. Unfortunately, simply fixing that by itself would break
save file compatibility for anyone who has been building with it set.
This workaround prevents the fix from doing that. And now folks can
rebuild after toggling TIMED_DELAY without unnecessarily invalidating
save and bones files.
-Allow overriding of OPTIONS_FILE in makdefs.c
-Change obsolete WIN32_GRAPHICS to the correct MSWIN_GRAPHICS
-Remove the 8514 and VESA screen control stuff since it never existed.
