Honghai Zhang 56c0b20490 Return both IPv6 and IPv4 address from the lookup.
We currently only return IPv4 address, which may cause issues in IPv6 networks
if we provide host name as the turn servers.

BUG=webrt:5871
R=juberti@google.com, pthatcher@webrtc.org

Review URL: https://codereview.webrtc.org/2083013008 .

Cr-Commit-Position: refs/heads/master@{#13291}
2016-06-27 05:11:24 +00:00
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