* Bump the HS startup timeout
* Log prefixes for more processes
* Bump the overall timeout

There's no guarantee that module callbacks will handle cancellation
appropriately. Protect module callbacks with read semantics from
cancellation and avoid swallowing `CancelledError`s that arise.

Other module callbacks, such as the `on_*` callbacks, are presumed to
live on code paths that involve writes and aren't cancellation-friendly.
These module callbacks have been left alone.

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

#12587 has fallen on the wrong side of the release cutoff to the rest of
the related PRs.

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

Fixes #12669

* Move `pympler` back into the `all` extras

Undoes a change I made in #12381. I can't fully remember my reasoning,
but this changed the contents of the debian packages in a backwards
incompatible way. We're not aware of anyone who's been bitten by this,
but we still want to fix it.

To the reviewer: please be convinced that the debian packages will still
contain pympler after this change.

* Debian changelog entry to keep the linter happy

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)

Signed-off-by: Nicolas Werner <nicolas.werner@hotmail.de>

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

Update the "Build docker images" GitHub Actions workflow to use
`docker/metadata-action` to generate docker image tags, instead of a
custom shell script.

Signed-off-by: Henry <97804910+henryclw@users.noreply.github.com>

Fixes a regression from 8b309adb (#11660)
and b65acead (#11752) where events which
themselves were an edit or an annotation could have bundled aggregations calculated,
which is not allowed.

The last usage was removed in 5a1dd297 (#8059).

* 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

getClientIP was deprecated in Twisted 18.4.0, which also added
getClientAddress. The Synapse minimum version for Twisted is
currently 18.9.0, so all supported versions have the new API.

* Changes hidden read receipts to be a separate receipt type
  (instead of a field on `m.read`).
* Updates the `/receipts` endpoint to accept `m.fully_read`.

* `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>

The `latest_event` field of the bundled aggregations for `m.thread` relations
did not include bundled aggregations itself. This resulted in clients needing to
immediately request the event from the server (and thus making it useless that
the latest event itself was serialized instead of just including an event ID).

Fixes a couple of formatting errors which were introduced in #12475.