fix IPv6 static routes, is_ipaddrv6 returns true for strings including a CIDR mask, which then ended up broken.
fix IPv6 static routes, is_ipaddrv6 returns true for strings including a
CIDR mask, which then ended up broken.

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