Fix #6927 1:1 NAT validate address family
Fix #6927 1:1 NAT validate address family

Ensure that all the manually-entered addresses come from the same
address family - i.e. they are all either IPv4 or IPv6 addresses.
NOYB/pfsense,dennypage/pfsense,brunostein/pfsense,dennypage/pfsense,brunostein/pfsense,brunostein/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,phil-davis/pfsense,ptorsten/pfsense,pfsense/pfsense,NewEraCracker/pfsense,jxmx/pfsense,ptorsten/pfsense,ptorsten/pfsense,dennypage/pfsense,pfsense/pfsense,dennypage/pfsense,pfsense/pfsense,NOYB/pfsense,pfsense/pfsense,NOYB/pfsense,jxmx/pfsense,jxmx/pfsense,NewEraCracker/pfsense,phil-davis/pfsense