Minor reorg of cvsupd startup. It now gets started by perl script that
flips the uid/gid to nobody/nobody. It would be good to run this in a chroot shell, but that would be difficult given that we cannot easily rebuild cvsupd (modula-3). The right solution is to either run it in a jail or to move it to ops. Note, files in the sup tree obviously have to be world readable for cvsupd to send them off.