xiongguangjie 22f5f56130 rtc fix sdp ufag should not contain _ + = - by spec (#2993) ...

rtc 中的sdp ufrag 只能有数字与字母组成，不能包含其他符号（根据RFC 5245），包含 _ + = - , 在chromium
项目中有人提出过，详情见( https://crbug.com/1053756 )。chrome 也能正常处理_ + = -
等符号，但是在日志中会有警告如下 `[WARNING:transport_description.cc(32)] '-', '=', '#'
and '-' are not valid ice-char and thus not permitted in ufrag or pwd.
This is a protocol violation that is permitted to allow upgrading but
will be rejected in the future. See https://crbug.com/1053756`
因此修改

2023-11-19 14:36:03 +08:00

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