Fix transport parameters handling, crashes and CMake tweaks

• Better handling of transport parameter max_table_capcity < 32
• Fix NULL pointer dereference in handshake
• Fix 0-RTT transport parameter validation (issue #367)
• Remove unnecessary debug log to avoid NULL pointer dereference
• Tick connection on datagram write (pull #314)
• Do not dispatch write event for FINISHED stream
• Tweaks for CMake configuration (pull #354 #369 #370 #373 #374)
• Update ls-qpack to 2.3.0

Fixes to PLPMTUD, handshake and Windows build

• Fix overly strict assert()
• Do not reset path MTU due to three lost_mtu_probe
• Fix handshake failure due to too many realy data
• Better build support for Windows platform
• Update ls-qpack to 2.2.3

Fixes to DATAGRAM, BBR, handshake and memory leak

• Generate ACK for DATAGRAM frame while avoid RETX (issue #312 #325).
• Fix BBR end of startup phase detection (issue #328).
• Fix HTTP/3 v1 retry handling (issue #332)
• Fix memory leak when reset dcid (issue #333)
• Fix double decrement for ifc_active_cids_count (#334)
• Fix uninitialized value in frame_reader/frame_writer (#316)
• Remove a few overly strict asserts.

Fix Connection timeout and assert() false positive

• Do not timeout connection if peer sends PING frames.
• Do not assert for MTU probe packet when cancel a path.

Fine tune CONNECT_CLOSE; fix packet parser

• Only force TICK_CLOSE flag after received CONNECTION_CLOSE frame. (issue #292 #281)
• Avoid mismatch in packet parsing. (issue #262)
• Remove unnecessary shi_delete call.

Turn on HTTP/3 version 1; fix server PING and connection close

• Enable HTTP/3 v1 by default, drop draft 34.
• Prevent connection timeout when client does not send PING frame.
• Close connection ASAP after recieve CONNECTION_CLOSE (issue #284)
• Do not assert() when decode a trailer.
• Properly handle GOAWAY frame, do not close the last acknowledged stream.

Fixed HPACK decoder dynamic table size limit

• Update ls-hpack to 2.3.0 to properly enforce decoder dynamic table size limit (issue #260).

Fix uninitialized member, high CPU usage and h3spec

• Fixed an unintialized data member for handling pushed headers.
• Added a new status code for version negotiation failure.
• Fixed a few compliance issues found by h3spec.
• Addressed high CPU usage when transport cannot send pending packets.

Fix high CPU usage, SIGFPE; multiple headers support

• Added support for sending/receiving multiple headers to address the case related to "100 continue" header handling.
• Addressed high CPU usage for a GOAWAY connection before sending CONNECTION_CLOSE.
• Addressed SIGFPE due to zero pacing rate. (ISSUE #254).
• Fixed a minor issue related to multi-paths.

Internals docs; h3spec and other fixes

• Documentation: describe lsquic internals ("guts").
• Two more fixes to compliance issues found by h3spec.
• Truncate, don't abort, SCIDs larger than 16 bytes (PR #244).
• Several small internal improvements and space optimizations.