Synapse 1.92.0rc1 (2023-09-05)

Features

• Add configuration setting for CAS protocol version. Contributed by Aurélien Grimpard. (#15816)
• Suppress notifications from message edits per MSC3958. (#16113)
• Return a Retry-After with M_LIMIT_EXCEEDED error responses. (#16136)
• Add last_seen_ts to the admin users API. (#16218)
• Improve resource usage when sending data to a large number of remote hosts that are marked as "down". (#16223)

Bugfixes

• Fix IPv6-related bugs on SMTP settings, adding groundwork to fix similar issues. Contributed by @evilham and @telmich (ungleich.ch). (#16155)
• Fix a spec compliance issue where requests to the /publicRooms federation API would specify include_all_networks as a string. (#16185)
• Fix inaccurate error message while attempting to ban or unban a user with the same or higher PL by spliting the conditional statements. Contributed by @leviosacz. (#16205)
• Fix a rare bug that broke looping calls, which could lead to e.g. linearly increasing memory usage. Introduced in v1.90.0. (#16210)
• Fix a long-standing bug where uploading images would fail if we could not generate thumbnails for them. (#16211)
• Fix a long-standing bug where we did not correctly back off from servers that had "gone" if they returned 4xx series error codes. (#16221)

Improved Documentation

• Update links to the matrix.org blog. (#16008)
• Document which admin APIs are disabled when experimental MSC3861 support is enabled. (#16168)
• Document exclude_rooms_from_sync configuration option. (#16178)

Internal Changes

• Prepare unit tests for Python 3.12. (#16099)
• Fix nightly CI jobs. (#16121, #16213)
• Describe which rate limiter was hit in logs. (#16135)
• Simplify presence code when using workers. (#16170)
• Track per-device information in the presence code. (#16171, #16172)
• Stop using the event_txn_id table. (#16175)
• Use AsyncMock instead of custom code. (#16179, #16180)
• Improve error reporting of invalid data passed to /_matrix/key/v2/query. (#16183)
• Task scheduler: add replication notify for new task to launch ASAP. (#16184)
• Improve type hints. (#16186, #16188, #16201)
• Bump black version to 23.7.0. (#16187)
• Log the details of background update failures. (#16212)
• Cache device resync requests over replication. (#16241)

Updates to locked dependencies

• Bump anyhow from 1.0.72 to 1.0.75. (#16141)
• Bump furo from 2023.7.26 to 2023.8.19. (#16238)
• Bump phonenumbers from 8.13.18 to 8.13.19. (#16237)
• Bump psycopg2 from 2.9.6 to 2.9.7. (#16196)
• Bump regex from 1.9.3 to 1.9.4. (#16195)
• Bump ruff from 0.0.277 to 0.0.286. (#16198)
• Bump sentry-sdk from 1.29.2 to 1.30.0. (#16236)
• Bump serde from 1.0.184 to 1.0.188. (#16194)
• Bump serde_json from 1.0.104 to 1.0.105. (#16140)
• Bump types-psycopg2 from 2.9.21.10 to 2.9.21.11. (#16200)
• Bump types-pyyaml from 6.0.12.10 to 6.0.12.11. (#16199)