Remove openvpn csc file when option is disabled.

Ticket #1339
Remove openvpn csc file when option is disabled.

Ticket #1339

dennypage/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,jxmx/pfsense,brunostein/pfsense,jxmx/pfsense,NOYB/pfsense,dennypage/pfsense,brunostein/pfsense,phil-davis/pfsense,phil-davis/pfsense,ptorsten/pfsense,pfsense/pfsense,dennypage/pfsense,phil-davis/pfsense,BlackstarGroup/pfsense,NOYB/pfsense,ch1c4um/pfsense,dennypage/pfsense,ch1c4um/pfsense,pfsense/pfsense,ch1c4um/pfsense,NewEraCracker/pfsense,pfsense/pfsense,pfsense/pfsense,ch1c4um/pfsense,jxmx/pfsense,NOYB/pfsense,brunostein/pfsense