Properly address IPV6 loopback check.

Submitted by:	jmg (via twitter)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375210 35697150-7ecd-e111-bb59-0022644237b5
MX4200 is still broken.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375211 35697150-7ecd-e111-bb59-0022644237b5