[webrtc-pc] restartIce(): Look at only ufrag or (ufrag,pwd)? (#2229)

henbos has just created a new issue for https://github.com/w3c/webrtc-pc:

== restartIce(): Look at only ufrag or (ufrag,pwd)? ==
The spec talks only about comparing ufrags, but ICE credentials involves both ice-ufrag and ice-pwd. These are in separate a= lines.

In my [work-in-progress implementation](https://webrtc-review.googlesource.com/c/src/+/144941/10/pc/peer_connection.h#1395) I assumed that "ICE credentials" refers to both, not just the ufrag part, but it would perhaps be strange if changing the pwd counts as a restart? I'm not sure what that would mean though...

@jan-ivar Should we only look at ufrag or at (ufrag,pwd)?

Please view or discuss this issue at https://github.com/w3c/webrtc-pc/issues/2229 using your GitHub account