Control the max IPv6 Networks used by WebRTC.

BUG=
R=juberti@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/38589004

Cr-Commit-Position: refs/heads/master@{#8209}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8209 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed