needed to fully support the "new distrib world order"):
* remove unnecessary trailing ;
* clean up whitespace
* remove unnecessary chown root or chgrp wheel directives; older code here
didn't bother doing this, so why be inconsistent
* don't barf when we have fdesc mounted; just skip the devices fdesc provides
* when making directories, don't use -p and don't redirect stdout to /dev/null
* add /dev/fd/* support [hp300]
* convert to new pty generation [hp300]
(prevents spurious warning for mfs /dev, amongst other things)
- for mipsco, news68k, newsmips: ensure that "umask 77" is run after $0.local
- for playstation2: add local) target, and use in all) (for consistency)