- [FEATURE] Use "no-progress timeout" after which connection is closed. - [BUGFIX] Select new SCID when current SCID is retired. - [BUGFIX] Don't warn about dropped Initial packet sequence gaps during mini/full handoff. - [BUGFIX] Send correct conn error when HTTP/3 frame is truncated. - [BUGFIX] Mini conn: consider amplification when deciding to return TICK_SEND. - [BUGFIX] Don't double-count tag length in amplification logic. - [BUGFIX] Don't squeeze out lone path challenges. - [BUGFIX] Log messages dealing with scheduled packet queue squeezing. - [BUGFIX] don't wipe current path if no path challenge responses come back. - [BUGFIX] When path is reset, don't lose path_id which is used for logging. - Downgrade flow control violations to info log level from warnings. - Fix connection cap extra check, avoid checks in nested calls. - Fix some unit tests when extra checks are enabled. - Use ls-hpack 2.2.1. - Turn off unconditional extra checks for IETF clients. - Extra checks: don't verify sent size of hello packets. Client changes DCID length and this check will fail.