Web updates

WebRTC 945fb8d5c0f9

Adding note about the dangers of RTCDataChannelInit.negotiated. Fixes #1879. If one peer creates an out-of-band negotiated data channel and tries to send with it before the other peer creates its corresponding data channel, messages may be lost (even if the channel is reliable). Raised this issue on the rtcweb mailing list here: But there's no clear consensus, with more people suggesting "do nothing" than anything else. Given that this has always been an issue in Chrome and Firefox and no one has really complained, maybe just adding this note is sufficient.

Taylor Brandstetter