libcmd changes

05/09/95 add getconf
	 cat -u avoids mmap
	 add chown|chgrp -m uid|gid map file
	 add chown|chgrp -P for systems with lchown(2)
	 chown|chgrp -P => lstat() too!
	 chmod|chown|chgrp -HLP
04/01/95 version 1.2
	 add rmdir
02/14/95 fix mkdir -p symlink bug
	 fix mkdir '/' skip bug that went one too far