• Handle ECT-CE event: issue a loss event.
• Log the fact that we ignore SETTINGS_MAX_HEADER_LIST_SIZE.
• Use Max Push ID in GOAWAY frame to cancel promises.
• Add support for HTTP/3 CANCEL_PUSH frame.
• lsquic_stream_is_pushed: streams without headers are never pushed.
• [BUGFIX] Regression in lsquic_stream_shutdown_internal: now it shuts down.
• Improve logic whether to generate CONNECTION_CLOSE.