IPs we were using at some point (by reclaiming CVL IPs, etc), or are mentioned in /etc/exports on Cyberdelia

* 128.173.88.161 (security.ece.vt.edu) - was once milton's IP until luug IPs got routed behind router.ece.vt.edu.

* 128.173.88.131 (dog.ece.vt.edu) - we have a Sun box labeled "dog.ece.vt.edu" but the IP appears to be in use now.