RFC compliance, memory bug fixes and fine tunings

• More strict RFC compliance.
• Minimize packet generated when send STREAM_BLOCKED frame
• Fix memory management bugs.
• Fix memory leak in unit tests.

Optimize STREAM_BLOCKED frame generation

• Avoid putting STREAM_BLOCKED frame in a separate packet.

Fix send_ctl, logging, CID storage

• Fix send_ctl bug.
• Make log ID consistent
• Reduce memory usage for storing CIDs.

QUICv2, Version Negotiation, handshake/interop improvements

• Add support for QUICv2 (RFC9369).
• Add support for version negotiation (RFC9368).
• Retry packet for address validation.
• Improve handshake under high packet loss/corruption.
• Improve QUIC interop results

Fix blocked header stream, packet resize

• Fix blocked header encoding stream due to connection flow control congestion.
• Fix qeh_write_headers bug for Windows.
• Fix corner case for packet resizing.

Fix PATH validation, STOP_SENDING and memory leaks

• Improve path validation logic to avoid sending padded packet to unverified peer, follow 3X anti-amplification rule.
• Optimize application callback when STOP_SENDING frame is received.
• Improve new connection callback logic.
• Improve handling of a closed connection.
• Update BoringSSL to the most recent version.
• Fix memory leaks in gquic handshake and packet handling.
• Update ls-qpack to 2.5.1, ls-hpack to 2.3.1 to address compiler warnings

Fix decoder, memory leak and assert failure

• Update ls-qpack to 2.5.0 to address a decoder bug
• Assertion failure if poison packet was acked
• Fix packet_in pool memory leak

Fix test binaries

• Clear connection context in on_conn_closed() callback.

Fix use-after-free, memory leak and corner cases.

• Update ls-qpack to 2.4.0 to address a use-after-free bug
• Address a few corner cases that trigger assert failures.
• Properly handle unexpected large packet for gQUIC.
• Fix memory leak in shared hash interface
• Fix IPv6 MTU detection
• Fix the wrong size used in packet regeneration.

Fix memory leak

• Fix memory leak in processing stream frames (issue #368)