routertype field in the nodes table. For eventual use when Mike is
ready with gated stuff.

Modify the dohostnames stuff as per dicussion with Rob and
Mac. Instead semi-usless node-N names, set the name of the interface
to node-LinkName, where the linkname comes from the virt_lans table,
and is the name of the link/lan that interface is sitting on. This way
the user can actually figure out the interface when doing his routing
by assigning names to all links/lans in the NS file.

One major bogousity is that in order to maintain backwards
compatability, I've instituted a new hostnames commands (hostnamesV2).
We need a good way to deal with versioning!