1.22.0rc1

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+Synapse 1.22.0rc1 (2020-10-22)
+==============================
+
+Features
+--------
+
+- Add a configuration option for always using the "userinfo endpoint" for OpenID Connect. This fixes support for some identity providers, e.g. GitLab. Contributed by Benjamin Koch. ([\#7658](https://github.com/matrix-org/synapse/issues/7658))
+- Allow `ThirdPartyEventRules` modules to query and manipulate whether a room is in the public rooms directory. ([\#8292](https://github.com/matrix-org/synapse/issues/8292), [\#8467](https://github.com/matrix-org/synapse/issues/8467))
+- Add support for olm fallback keys ([MSC2732](https://github.com/matrix-org/matrix-doc/pull/2732)). ([\#8312](https://github.com/matrix-org/synapse/issues/8312), [\#8501](https://github.com/matrix-org/synapse/issues/8501))
+- Allow running background tasks in a separate worker process. ([\#8369](https://github.com/matrix-org/synapse/issues/8369), [\#8458](https://github.com/matrix-org/synapse/issues/8458), [\#8489](https://github.com/matrix-org/synapse/issues/8489), [\#8513](https://github.com/matrix-org/synapse/issues/8513), [\#8544](https://github.com/matrix-org/synapse/issues/8544), [\#8599](https://github.com/matrix-org/synapse/issues/8599))
+- Add support for device dehydration ([MSC2697](https://github.com/matrix-org/matrix-doc/pull/2697)). ([\#8380](https://github.com/matrix-org/synapse/issues/8380))
+- Implement [MSC2409](https://github.com/matrix-org/matrix-doc/pull/2409) to send typing, read receipts, and presence events to appservices. ([\#8437](https://github.com/matrix-org/synapse/issues/8437))
+- Change default room version to "6", per [MSC2788](https://github.com/matrix-org/matrix-doc/pull/2788). ([\#8461](https://github.com/matrix-org/synapse/issues/8461))
+- Add the ability to send non-membership events into a room via the `ModuleApi`. ([\#8479](https://github.com/matrix-org/synapse/issues/8479))
+- Increase default upload size limit from 10M to 50M. Contributed by @Akkowicz. ([\#8502](https://github.com/matrix-org/synapse/issues/8502))
+- Support modifying event content in `ThirdPartyRules` modules. ([\#8535](https://github.com/matrix-org/synapse/issues/8535), [\#8564](https://github.com/matrix-org/synapse/issues/8564))
+- Limit appservice transactions to 100 persistent and 100 ephemeral events. ([\#8606](https://github.com/matrix-org/synapse/issues/8606))
+
+
+Bugfixes
+--------
+
+- Fix a longstanding bug where invalid ignored users in account data could break clients. ([\#8454](https://github.com/matrix-org/synapse/issues/8454))
+- Fix a bug where backfilling a room with an event that was missing the `redacts` field would break. ([\#8457](https://github.com/matrix-org/synapse/issues/8457))
+- Don't attempt to respond to some requests if the client has already disconnected. ([\#8465](https://github.com/matrix-org/synapse/issues/8465))
+- Fix message duplication if something goes wrong after persisting the event. ([\#8476](https://github.com/matrix-org/synapse/issues/8476))
+- Fix incremental sync returning an incorrect `prev_batch` token in timeline section, which when used to paginate returned events that were included in the incremental sync. Broken since v0.16.0. ([\#8486](https://github.com/matrix-org/synapse/issues/8486))
+- Expose the `uk.half-shot.msc2778.login.application_service` to clients from the login API. This feature was added in v1.21.0, but was not exposed as a potential login flow. ([\#8504](https://github.com/matrix-org/synapse/issues/8504))
+- Fix error code for `/profile/{userId}/displayname` to be `M_BAD_JSON`. ([\#8517](https://github.com/matrix-org/synapse/issues/8517))
+- Fix a bug introduced in v1.7.0 that could cause Synapse to insert values from non-state `m.room.retention` events into the `room_retention` database table. ([\#8527](https://github.com/matrix-org/synapse/issues/8527))
+- Fix not sending events over federation when using sharded event writers. ([\#8536](https://github.com/matrix-org/synapse/issues/8536))
+- Fix a long standing bug where email notifications for encrypted messages were blank. ([\#8545](https://github.com/matrix-org/synapse/issues/8545))
+- Fix increase in the number of `There was no active span...` errors logged when using OpenTracing. ([\#8567](https://github.com/matrix-org/synapse/issues/8567))
+- Fix a bug that prevented errors encountered during execution of the `synapse_port_db` from being correctly printed. ([\#8585](https://github.com/matrix-org/synapse/issues/8585))
+
+
+Updates to the Docker image
+---------------------------
+
+- Added multi-arch support (arm64,arm/v7) for the docker images. Contributed by @maquis196. ([\#7921](https://github.com/matrix-org/synapse/issues/7921))
+- Add support for passing commandline args to the synapse process. Contributed by @samuel-p. ([\#8390](https://github.com/matrix-org/synapse/issues/8390))
+
+
+Improved Documentation
+----------------------
+
+- Update the directions for using the manhole with coroutines. ([\#8462](https://github.com/matrix-org/synapse/issues/8462))
+- Improve readme by adding new shield.io badges. ([\#8493](https://github.com/matrix-org/synapse/issues/8493))
+- Added note about docker in manhole.md regarding which ip address to bind to. Contributed by @Maquis196. ([\#8526](https://github.com/matrix-org/synapse/issues/8526))
+- Document the new behaviour of the `allowed_lifetime_min` and `allowed_lifetime_max` settings in the room retention configuration. ([\#8529](https://github.com/matrix-org/synapse/issues/8529))
+
+
+Deprecations and Removals
+-------------------------
+
+- Drop unused `device_max_stream_id` table. ([\#8589](https://github.com/matrix-org/synapse/issues/8589))
+
+
+Internal Changes
+----------------
+
+- Add typing information to the device handler. ([\#8407](https://github.com/matrix-org/synapse/issues/8407))
+- Check for unreachable code with mypy. ([\#8432](https://github.com/matrix-org/synapse/issues/8432))
+- Add unit test for event persister sharding. ([\#8433](https://github.com/matrix-org/synapse/issues/8433))
+- Allow events to be sent to clients sooner when using sharded event persisters. ([\#8439](https://github.com/matrix-org/synapse/issues/8439), [\#8488](https://github.com/matrix-org/synapse/issues/8488), [\#8496](https://github.com/matrix-org/synapse/issues/8496), [\#8499](https://github.com/matrix-org/synapse/issues/8499))
+- Configure `public_baseurl` when using demo scripts. ([\#8443](https://github.com/matrix-org/synapse/issues/8443))
+- Add SQL logging on queries that happen during startup. ([\#8448](https://github.com/matrix-org/synapse/issues/8448))
+- Speed up unit tests when using PostgreSQL. ([\#8450](https://github.com/matrix-org/synapse/issues/8450))
+- Remove redundant databae loads of stream_ordering for events we already have. ([\#8452](https://github.com/matrix-org/synapse/issues/8452))
+- Reduce inconsistencies between codepaths for membership and non-membership events. ([\#8463](https://github.com/matrix-org/synapse/issues/8463))
+- Combine `SpamCheckerApi` with the more generic `ModuleApi`. ([\#8464](https://github.com/matrix-org/synapse/issues/8464))
+- Additional testing for `ThirdPartyEventRules`. ([\#8468](https://github.com/matrix-org/synapse/issues/8468))
+- Add `-d` option to `./scripts-dev/lint.sh` to lint files that have changed since the last git commit. ([\#8472](https://github.com/matrix-org/synapse/issues/8472))
+- Unblacklist some sytests. ([\#8474](https://github.com/matrix-org/synapse/issues/8474))
+- Include the log level in the phone home stats. ([\#8477](https://github.com/matrix-org/synapse/issues/8477))
+- Remove outdated sphinx documentation, scripts and configuration. ([\#8480](https://github.com/matrix-org/synapse/issues/8480))
+- Clarify error message when plugin config parsers raise an error. ([\#8492](https://github.com/matrix-org/synapse/issues/8492))
+- Remove the deprecated `Handlers` object. ([\#8494](https://github.com/matrix-org/synapse/issues/8494))
+- Fix a threadsafety bug in unit tests. ([\#8497](https://github.com/matrix-org/synapse/issues/8497))
+- Add user agent to user_daily_visits table. ([\#8503](https://github.com/matrix-org/synapse/issues/8503))
+- Add type hints to various parts of the code base. ([\#8505](https://github.com/matrix-org/synapse/issues/8505), [\#8507](https://github.com/matrix-org/synapse/issues/8507))
+- Remove unused code from the test framework. ([\#8514](https://github.com/matrix-org/synapse/issues/8514))
+- Apply some internal fixes to the `HomeServer` class to make its code more idiomatic and statically-verifiable. ([\#8515](https://github.com/matrix-org/synapse/issues/8515))
+- Factor out common code between `RoomMemberHandler._locally_reject_invite` and `EventCreationHandler.create_event`. ([\#8537](https://github.com/matrix-org/synapse/issues/8537))
+- Improve database performance by executing more queries without starting transactions. ([\#8542](https://github.com/matrix-org/synapse/issues/8542))
+- Enable mypy type checking for `synapse.util.caches`. ([\#8547](https://github.com/matrix-org/synapse/issues/8547))
+- Rename `Cache` to `DeferredCache`, to better reflect its purpose. ([\#8548](https://github.com/matrix-org/synapse/issues/8548))
+- Move metric registration code down into `LruCache`. ([\#8561](https://github.com/matrix-org/synapse/issues/8561), [\#8591](https://github.com/matrix-org/synapse/issues/8591))
+- Add type annotations for `LruCache`. ([\#8562](https://github.com/matrix-org/synapse/issues/8562))
+- Replace `DeferredCache` with the lighter-weight `LruCache` where possible. ([\#8563](https://github.com/matrix-org/synapse/issues/8563))
+- Add virtualenv-generated folders to `.gitignore`. ([\#8566](https://github.com/matrix-org/synapse/issues/8566))
+- Add `get_immediate` method to `DeferredCache`. ([\#8568](https://github.com/matrix-org/synapse/issues/8568))
+- Fix mypy not properly checking across the codebase, additionally, fix a typing assertion error in `handlers/auth.py`. ([\#8569](https://github.com/matrix-org/synapse/issues/8569))
+- Fix `synmark` benchmark runner. ([\#8571](https://github.com/matrix-org/synapse/issues/8571))
+- Modify `DeferredCache.get()` to return `Deferred`s instead of `ObservableDeferred`s. ([\#8572](https://github.com/matrix-org/synapse/issues/8572))
+- Adjust a protocol-type definition to fit `sqlite3` assertions. ([\#8577](https://github.com/matrix-org/synapse/issues/8577))
+- Support macOS on the `synmark` benchmark runner. ([\#8578](https://github.com/matrix-org/synapse/issues/8578))
+- Update `mypy` static type checker to 0.790. ([\#8583](https://github.com/matrix-org/synapse/issues/8583), [\#8600](https://github.com/matrix-org/synapse/issues/8600))
+- Re-organize the structured logging code to separate the TCP transport handling from the JSON formatting. ([\#8587](https://github.com/matrix-org/synapse/issues/8587))
+- Implement [MSC2409](https://github.com/matrix-org/matrix-doc/pull/2409) to send typing, read receipts, and presence events to appservices. ([\#8590](https://github.com/matrix-org/synapse/issues/8590))
+- Remove extraneous unittest logging decorators from unit tests. ([\#8592](https://github.com/matrix-org/synapse/issues/8592))
+- Minor optimisations in caching code. ([\#8593](https://github.com/matrix-org/synapse/issues/8593), [\#8594](https://github.com/matrix-org/synapse/issues/8594))
+- Add type hints to profile and base handler. ([\#8609](https://github.com/matrix-org/synapse/issues/8609))
+
+
 Synapse 1.21.2 (2020-10-15)
 ===========================