Don't add duplicate networks.
Don't add duplicate networks.

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