Bug fixes; emit fewer warnings

• [BUGFIX] IETF QUIC server: fix uninitialized variable use.
• [BUGFIX] make sure TLSv1.3 is not disabled in SSL object.
• [BUGFIX] Use issuer name and serial number to cache certs (SKID values are not unique).
• [BUGFIX] Always set the idle alarm in IETF connection so that it can time out.
• Use ls-qpack v0.10.6, as it silences some warnings.

Use ls-qpack 0.10.5

• [OPTIMIZATION, BUGFIX] Use ls-qpack v0.10.5.

Non-HTTP/3 client and server examples; bug fixes

• Add echo client and server to the distibution.
• Add MD5 client and server to the distibution.
• Fix http_client: check command-line arguments better, prevent crash.
• Fix IETF conn: can_write_ack() should only care about APP PNS.
• Client: delay stream creation until handshake succeds.
• Reset HTTP stream whose write end is closed prematurely.
• Fix tickable(): mirror behavior of tick() wrt buffered packets.
• Log reason why engine is tickable.

Minor code and logging improvements

Release 2.4.6

- Minor code cleanup and logging improvements.
- Server and client programs: include library version (e.g. 2.4.6)
  into `server' and `user-agent' headers.

Post-interop bugfix release

• [API] Add lsquic_alpn2ver() to aid parsing Alt-Svc header.
• [BUGFIX] NULL dereference when H3 frame header would be split.
• [BUGFIX] Do not close fixed-size H3 frame prematurely.
• [BUGFIX] Allow PING frames in IETF mini conn.
• [BUGFIX] Mini conns: don't send any packets after receiving CONNECTION_CLOSE.
• [BUGFIX] Client migration: reserve slot for DCID from transport params.
• [BUGFIX] Allow max_early_data_size=0 -- early_data might not be there.
• [BUGFIX] Use an invalid stream number to reset BPT cache (zero is now a valid stream number).
• [SPEC] Use FINAL_SIZE_ERROR when FIN mismatch is detected.
• [OPTIMIZATION] Closed connection only gets one chance to send packets.
• [OPTIMIZATION] Flush headers stream before packetizing stream data.
• [OPTIMIZATION] process QPACK encoder STREAM frames immediately.
• Update ls-qpack to v0.10.1.

Mongrel ALPN and bugfix release

• Add GQUIC versions to the list of h3 ALPNs for Alt-Svc header. For example, h3-Q043. Chrome will switch to using this format at some point in the future.
• [BUGFIX] Send correct value in max_streams_uni transport param
• [SPEC] Abort IETF QUIC connection if max_early_data_size is not set to 0xFFFFFFFF

Bugfix release

• [BUGFIX] H3 framing: fix zero-byte write when space is available
• [BUGFIX] Don't send STREAM frame when incoming unidirectgional stream is closed
• [BUGFIX] Cancel all pending writes by stream reset by a GOAWAY
• [BUGFIX] Fix use-after-free in IETF full conn
• [OPTIMIZATION] Wait for session tickets for two seconds and then drop SSL object and crypto streams

QUIC and HTTP/3 Internet Draft 23 support

v2.4.0

Use ls-qpack v0.10.0

Fix memory leaks, unit tests

Release 2.3.1

- [BUGFIX] Fix memory leaks
- [BUGFIX] Fix unit tests

Use BBR congestrion control algorithm

• [FEATURE] BBR congestion control is on by default
• [BUGFIX] BBR app-limited logic
• [BUGFIX] Fix uninitialized warnings in IETF
• [BUGFIX] Update ls-qpack to v0.9.14
• [CLEANUP] Code cleanup