This is the 2.2.19 release, which contains:
[#929] wire.py#update_goal_state does not handle out-of-date GoalState errors
[#908] Set Files to 0400 in /var/lib/waagent
[#906] Hardcoded value for sshd's ClientAliveInterval (180)
[#899] Improve HeartBeat Event
[#898] Send dummy status if extension fails to write a #.status file
[#897] 'Target handler state' wall of errors
[#896] End of Line Comments are Not Supported nor Handled
[#891] Create a Telemetry Event to Track Custom Data Execution
[#884] Cleanup Old Goal State and Extension Cache
[#876] The agent should use a scaling back-off when retrying HTTP requests
[#869] The agent should report OS information in the correct JSON format.
[#822] Update docs