Ticket #944. Do not use the interface_bring_down fucntion here since it is meant for assigned interfaces. Directly destroy previous vlan interface if parent changes.
Ticket #944. Do not use the interface_bring_down fucntion here since it is meant for assigned interfaces. Directly destroy previous vlan interface if parent changes.

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