Add "auto" as a synonim for "default".
Add "auto" as a synonim for "default".

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