Refactor acceptance of new local connections
Refactor acceptance of new local connections

The various cases of success or failure are quite intricate.  Since we
plan to intricate it further in an upcoming commit, it's better to
refactor it now.

Drooids/babeld,boutier/babeld,Gwendocg/babeldToS,dtaht/babeld-shortrtt-metrics,jech/babeld,sudomesh/babeld,wlanslovenija/babeld,jech/babeld,Gwendocg/babeldToS,woniullb/babeld,wlanslovenija/babeld,tcatm/babeld