Allow inet addrs to be 0.0.0.0 (which indirectly indicates DHCP mode). Also fix bug in "info" mode, that was causing it to be less than informative.
Allow inet addrs to be 0.0.0.0 (which indirectly indicates DHCP mode).
Also fix bug in "info" mode, that was causing it to be less than
informative.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome