Fix RETIRE_CONNECTION_ID frame abuse

• Fix RETIRE_CONNECTION_ID frame abuse.
• Fix some assert failures.

Fix 0-RTT packet validation, update docker build

• Fix overly strict 0-RTT packet DCID validation.
• Update docker build.

Fix ACK and CONNECTION_CLOSE

• Fix ACK handling.
• Do not apply congestion control to CONNECTION_CLOSE frame.

More STREAM_BLOCKED fixes

• Fix CPU spinning due to sending STREAM_BLOCKED frame.

Fix sending STREAM_BLOCKED frame

• Address high CPU usage related to sending STREAM_BLOCKED frame

Fix DCID validation and CPU spin

• Fix DCID validation.
• Fix CPU spinning due to pending STREAM_BLOCKED frame.

Fix session resumption

• Fix session resumption bug introduced in 4.0.2.

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.