This should prevent TURN from being used in NAT slipstream attacks with native clients. Bug: webrtc:12497 Change-Id: I3c33df92e97b8e6430b72a05790c137d89661093 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208582 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Philipp Hancke <philipp.hancke@googlemail.com> Reviewed-by: Jonas Oreland <jonaso@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33356}