dns: fix `resolve` failed starts without network

Fix the bug that you start process without network at first, but it
connected lately, `dns.resolve` will stay failed with ECONNREFUSED
because c-ares servers fallback to 127.0.0.1 at the very beginning.

If c-ares servers "127.0.0.1" is detected and its not set by user self,
and last query is not OK, recreating `ares_channel` operation will be
triggered to reload servers.

Fixes: https://github.com/nodejs/node/issues/1644
PR-URL: https://github.com/nodejs/node/pull/13076


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>