Allow Re-Registration

If a peer “re-registers” we were not updating it’s registration
information. For example, it may have changed it’s MODE byte, or worse,
it’s port number, etc. and we’d have missed it
reduce peer_list function logging
NOT FULLY FUNCTIONAL: Backup Bridge

Bridge application that identifies known bridges based on RADIO ID and
does NOT bridge if they are actively connected to an IPSC and MODE byte
shows linking on a timeslot.