Update IPV6.inc to latest 1.2.1 version
Update IPV6.inc to latest 1.2.1 version

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