Add freeDNS v6 support
FreeDNS IPv6 support confirmed working using same method as v4 with v6 source address. Simple second service with _useIPv6(cherry picked from commit ac16181a2cfefec293e0562a7bfe8e2f7140e191)
Add freeDNS v6 support
FreeDNS IPv6 support confirmed working using same method as v4 with v6 source address. Simple second service with _useIPv6
(cherry picked from commit ac16181a2cfefec293e0562a7bfe8e2f7140e191)