for their broken linux based ld.so to work correctly with non
/usr/lib shared libs

Move xdm back to rc.local; if your X server need access to /dev/mem
and you do not use the ap driver starting xdm from rc.securelevel
will only help the first time.
Add other rc.securelevel examples that are not daemons.

add rm -f to mk()

pcvt days and no longer required

Cleanup so all Quantum disks are now Capitalized.

This fixes namespace problems where STRIP is sometimes used as
the name of the strip(1) to use and other times used as
the flag to send install(1) when stripping (or not).
COPY doesn't have this problem (yet) but was poorly named.

an environment variable

It almost is free of expr but will require more work.
PLEASE let me know if this changes anything ASAP!

Same change doen for SKEY, YP, and KERBEROS5.  This allows
people to override those setting in /etc/mk.conf.