Filter out IPv6 localhost from FQDN on OS X

Don't return the hostname "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" for  OS  X when no minion ID is found in the config