Make is_ipaddrv6() compatible with is_ipaddrv4().
Make is_ipaddrv6() compatible with is_ipaddrv4().

Only the IP address must be accepted, address with netmasks do not qualify.

Ticket #8024

ptorsten/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,pfsense/pfsense,pfsense/pfsense,phil-davis/pfsense,dennypage/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,pfsense/pfsense,dennypage/pfsense,ptorsten/pfsense,pfsense/pfsense,dennypage/pfsense,phil-davis/pfsense,dennypage/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,NewEraCracker/pfsense