Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

Add an option allowing users to use their password to reauthenticate even though password authentication is disabled. (#12883)

Removes the unstable endpoint as well as a duplicated field
which was modified during stabilization.

Makes it so that groups/communities no longer exist from a user-POV. E.g. we remove:

* All API endpoints (including Client-Server, Server-Server, and admin).
* Documented configuration options (and the experimental flag, which is now unused).
* Special handling during room upgrades.
* The `groups` section of the `/sync` response.

Signed-off-by: David Teller <davidt@element.io>

Signed-off-by: jesopo <github@lolnerd.net>

Add a unique index to `state_group_edges` to prevent duplicates being accidentally introduced and the consequential impact to performance. (#12687)

Signed-off-by: Sami Olmari <sami@olmari.fi>

docbook doesn't auto-linkify links

Signed-off-by: Sean Quah <seanq@matrix.org>

Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>

* Update openid.md

Newer versions of keycloak returning a 404 when using the `/auth` prefix.

Related: https://github.com/matrix-org/synapse/issues/12714

Co-authored-by: Matthew Hodgson <matthew@matrix.org>

Add the `update_user_directory_from_worker` configuration option (superseding `update_user_directory`) to allow a generic worker to be designated as the worker to update the user directory. (#12654)

Co-authored-by: Shay <hillerys@element.io>

Add the `notify_appservices_from_worker` configuration option (superseding `notify_appservices`) to allow a generic worker to be designated as the worker to send traffic to Application Services. (#12452)

* Add mau_appservice_trial_days

* Add a test

* Tweaks

* changelog

* Ensure we sync after the delay

* Fix types

* Add config statement

* Fix test

* Reinstate logging that got removed

* Fix feature name

* `m.login.jwt`, which was never specced and has been deprecated
  since Synapse 1.16.0. (`org.matrix.login.jwt` can be used instead.)
* `uk.half-shot.msc2778.login.application_service`, which was
  stabilized as part of the Matrix spec v1.2 release.

Don't log stack traces for cancelled requests and use a custom HTTP
status code of 499.

Signed-off-by: Sean Quah <seanq@element.io>