Synapse 1.11.0rc1 (2020-02-19)
==============================
Features
--------
- Admin API to add or modify threepids of user accounts. ([\#6769](https://github.com/matrix-org/synapse/issues/6769))
- Limit the number of events that can be requested by the backfill federation API to 100. ([\#6864](https://github.com/matrix-org/synapse/issues/6864))
- Add ability to run some group APIs on workers. ([\#6866](https://github.com/matrix-org/synapse/issues/6866))
- Reject device display names over 100 characters in length to prevent abuse. ([\#6882](https://github.com/matrix-org/synapse/issues/6882))
- Add ability to route federation user device queries to workers. ([\#6873](https://github.com/matrix-org/synapse/issues/6873))
- The result of a user directory search can now be filtered via the spam checker. ([\#6888](https://github.com/matrix-org/synapse/issues/6888))
- Implement new `GET /_matrix/client/unstable/org.matrix.msc2432/rooms/{roomId}/aliases` endpoint as per [MSC2432](https://github.com/matrix-org/matrix-doc/pull/2432). ([\#6939](https://github.com/matrix-org/synapse/issues/6939), [\#6948](https://github.com/matrix-org/synapse/issues/6948), [\#6949](https://github.com/matrix-org/synapse/issues/6949))
- Stop sending `m.room.alias` events wheng adding / removing aliases. Check `alt_aliases` in the latest `m.room.canonical_alias` event when deleting an alias. ([\#6904](https://github.com/matrix-org/synapse/issues/6904))
- Change the default power levels of invites, tombstones and server ACLs for new rooms. ([\#6834](https://github.com/matrix-org/synapse/issues/6834))
Bugfixes
--------
- Fixed third party event rules function `on_create_room`'s return value being ignored. ([\#6781](https://github.com/matrix-org/synapse/issues/6781))
- Allow URL-encoded User IDs on `/_synapse/admin/v2/users/<user_id>[/admin]` endpoints. Thanks to @NHAS for reporting. ([\#6825](https://github.com/matrix-org/synapse/issues/6825))
- Fix Synapse refusing to start if `federation_certificate_verification_whitelist` option is blank. ([\#6849](https://github.com/matrix-org/synapse/issues/6849))
- Fix errors from logging in the purge jobs related to the message retention policies support. ([\#6945](https://github.com/matrix-org/synapse/issues/6945))
- Return a 404 instead of 200 for querying information of a non-existant user through the admin API. ([\#6901](https://github.com/matrix-org/synapse/issues/6901))
Updates to the Docker image
---------------------------
- The deprecated "generate-config-on-the-fly" mode is no longer supported. ([\#6918](https://github.com/matrix-org/synapse/issues/6918))
Improved Documentation
----------------------
- Add details of PR merge strategy to contributing docs. ([\#6846](https://github.com/matrix-org/synapse/issues/6846))
- Spell out that the last event sent to a room won't be deleted by a purge. ([\#6891](https://github.com/matrix-org/synapse/issues/6891))
- Update Synapse's documentation to warn about the deprecation of ACME v1. ([\#6905](https://github.com/matrix-org/synapse/issues/6905), [\#6907](https://github.com/matrix-org/synapse/issues/6907), [\#6909](https://github.com/matrix-org/synapse/issues/6909))
- Add documentation for the spam checker. ([\#6906](https://github.com/matrix-org/synapse/issues/6906))
- Fix worker docs to point `/publicised_groups` API correctly. ([\#6938](https://github.com/matrix-org/synapse/issues/6938))
- Clean up and update docs on setting up federation. ([\#6940](https://github.com/matrix-org/synapse/issues/6940))
- Add a warning about indentation to generated configuration files. ([\#6920](https://github.com/matrix-org/synapse/issues/6920))
- Databases created using the compose file in contrib/docker will now always have correct encoding and locale settings. Contributed by Fridtjof Mund. ([\#6921](https://github.com/matrix-org/synapse/issues/6921))
- Update pip install directions in readme to avoid error when using zsh. ([\#6855](https://github.com/matrix-org/synapse/issues/6855))
Deprecations and Removals
-------------------------
- Remove `m.lazy_load_members` from `unstable_features` since lazy loading is in the stable Client-Server API version r0.5.0. ([\#6877](https://github.com/matrix-org/synapse/issues/6877))
Internal Changes
----------------
- Add type hints to `SyncHandler`. ([\#6821](https://github.com/matrix-org/synapse/issues/6821))
- Refactoring work in preparation for changing the event redaction algorithm. ([\#6823](https://github.com/matrix-org/synapse/issues/6823), [\#6827](https://github.com/matrix-org/synapse/issues/6827), [\#6854](https://github.com/matrix-org/synapse/issues/6854), [\#6856](https://github.com/matrix-org/synapse/issues/6856), [\#6857](https://github.com/matrix-org/synapse/issues/6857), [\#6858](https://github.com/matrix-org/synapse/issues/6858))
- Fix stacktraces when using `ObservableDeferred` and async/await. ([\#6836](https://github.com/matrix-org/synapse/issues/6836))
- Port much of `synapse.handlers.federation` to async/await. ([\#6837](https://github.com/matrix-org/synapse/issues/6837), [\#6840](https://github.com/matrix-org/synapse/issues/6840))
- Populate `rooms.room_version` database column at startup, rather than in a background update. ([\#6847](https://github.com/matrix-org/synapse/issues/6847))
- Reduce amount we log at `INFO` level. ([\#6833](https://github.com/matrix-org/synapse/issues/6833), [\#6862](https://github.com/matrix-org/synapse/issues/6862))
- Remove unused `get_room_stats_state` method. ([\#6869](https://github.com/matrix-org/synapse/issues/6869))
- Add typing to `synapse.federation.sender` and port to async/await. ([\#6871](https://github.com/matrix-org/synapse/issues/6871))
- Refactor `_EventInternalMetadata` object to improve type safety. ([\#6872](https://github.com/matrix-org/synapse/issues/6872))
- Add an additional entry to the SyTest blacklist for worker mode. ([\#6883](https://github.com/matrix-org/synapse/issues/6883))
- Fix the use of sed in the linting scripts when using BSD sed. ([\#6887](https://github.com/matrix-org/synapse/issues/6887))
- Add type hints to the spam checker module. ([\#6915](https://github.com/matrix-org/synapse/issues/6915))
- Convert the directory handler tests to use HomeserverTestCase. ([\#6919](https://github.com/matrix-org/synapse/issues/6919))
- Increase DB/CPU perf of `_is_server_still_joined` check. ([\#6936](https://github.com/matrix-org/synapse/issues/6936))
- Tiny optimisation for incoming HTTP request dispatch. ([\#6950](https://github.com/matrix-org/synapse/issues/6950))