* qlog: implement a Trace and a Writer struct
* qlog: rename Trace to FileSeq
* split qlog trace writer and QUIC qlog events into separate packages
* use the new qlog.Recorder instead of the logging.ConnectionTracer
* use require in benchmark tests
* translate the QLOGDIR test
* translate handshake tests
* translate the handshake RTT tests
* translate the early data test
* translate the MTU tests
* translate the key update test
* translate the stateless reset tests
* translate the packetization test
* translate the close test
* translate the resumption test
* translate the tracer test
* translate the connection ID length test
* translate the RTT tests
* translate the multiplexing tests
* translate the drop tests
* translate the handshake drop tests
* translate the 0-RTT tests
* translate the hotswap test
* translate the stream test
* translate the unidirectional stream test
* translate the timeout tests
* translate the MITM test
* rewrite the datagram tests
* translate the cancellation tests
* translate the deadline tests
* translate the test helpers
* enable DPLPMTUD on macOS dual-stack sockets
https://datatracker.ietf.org/doc/draft-seemann-tsvwg-udp-fragmentation/
contains details on how IP fragmentation is handled on different
platforms.
* only enable DF on macOS Sequoia (and newer) dual-stack sockets
* fix macOS version numbers
* fix comment in MTU integration test
* skip dual-stack test on old macOS versions
