Use fixed mask_prefix.
Use fixed mask_prefix.

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