Revert "dns: remove AI_V4MAPPED hint flag on FreeBSD"
Revert "dns: remove AI_V4MAPPED hint flag on FreeBSD"

This reverts commit 04bea9f9c224d9f863f671a1ad52a3f392b292cb.

PR-URL: https://github.com/iojs/io.js/pull/1555
Reviewed-By: Fedor Indutny <e39d94bae70283f13d24c278e04952d6dad9384b@indutny.com>
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node