More fixes to error handling in config parser.
More fixes to error handling in config parser.

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