Main change is deleting support for @userinfo in turn urls. This was
specified in early internet drafts, but never made it into RFC 7065.
Bug: webrtc:6663, webrtc:10422
Change-Id: Idd315a9e6001326f3104be62be3bd0991adc7db4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128423
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27171}