[44net] Portal registrations

It's especially important for the area coordinators to get themselves registered as such with the portal. I think that in a few months we'll just have to consider any regions with no registered coordinator as abandoned by their former coordinators. Similarly with gateways: at some time in the future gateways which aren't registered with the portal will have to be dropped from the encap file. People with existing allocations should make sure that their own allocation is registered with the portal, if necessary by going through the portal allocation process. If you do this, be sure to include a note that it's a re-registration of an existing allocation. - Brian