There are five almost-identical copies of unix here
(hkunix, rkunix, rlunix, rpunix, and xpunix).  All except xpunix
are stripped, and xpunix is linked to unix for programs like ps to use.
If you need to save space, remove all of these that you will not use
except unix itself.  All of the copies were patched with the script
genallsys.sh, which you can use as an example if you want to do any other
patching on one of these until you can recompile.