Upstream changes:

Synapse 1.70.1 (2022-10-28)
===========================

(bugfixes)


Synapse 1.70.0 (2022-10-26)
===========================

Features
--------

- Support for
  [MSC3856](matrix-org/matrix-spec-proposals#3856):
  threads list
  API. ([\#13394](matrix-org/synapse#13394),
  [\#14171](matrix-org/synapse#14171),
  [\#14175](matrix-org/synapse#14175))

- Support for thread-specific notifications & receipts
  ([MSC3771](matrix-org/matrix-spec-proposals#3771)
  and
  [MSC3773](matrix-org/matrix-spec-proposals#3773)). ([\#13776](matrix-org/synapse#13776),
  [\#13824](matrix-org/synapse#13824),
  [\#13877](matrix-org/synapse#13877),
  [\#13878](matrix-org/synapse#13878),
  [\#14050](matrix-org/synapse#14050),
  [\#14140](matrix-org/synapse#14140),
  [\#14159](matrix-org/synapse#14159),
  [\#14163](matrix-org/synapse#14163),
  [\#14174](matrix-org/synapse#14174),
  [\#14222](matrix-org/synapse#14222))

- Stop fetching missing `prev_events` after we already know their
  signature is
  invalid. ([\#13816](matrix-org/synapse#13816))

- Send application service access tokens as a header (and query
  parameter). Implements
  [MSC2832](matrix-org/matrix-spec-proposals#2832). ([\#13996](matrix-org/synapse#13996))

- Ignore server ACL changes when generating pushes. Implements
  [MSC3786](matrix-org/matrix-spec-proposals#3786). ([\#13997](matrix-org/synapse#13997))

- Experimental support for redirecting to an implementation of a
  [MSC3886](matrix-org/matrix-spec-proposals#3886)
  HTTP rendezvous
  service. ([\#14018](matrix-org/synapse#14018))

- The `/relations` endpoint can now be used on
  workers. ([\#14028](matrix-org/synapse#14028))

- Advertise support for Matrix 1.3 and 1.4 on
  `/_matrix/client/versions`. ([\#14032](matrix-org/synapse#14032),
  [\#14184](matrix-org/synapse#14184))

- Improve validation of request bodies for the [Device
  Management](https://spec.matrix.org/v1.4/client-server-api/#device-management)
  and [MSC2697 Device
  Dehyrdation](matrix-org/matrix-spec-proposals#2697)
  client-server API
  endpoints. ([\#14054](matrix-org/synapse#14054))

- Experimental support for
  [MSC3874](matrix-org/matrix-spec-proposals#3874):
  Filtering threads from the `/messages`
  endpoint. ([\#14148](matrix-org/synapse#14148))

- Improve the validation of the following PUT endpoints:
  [`/directory/room/{roomAlias}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3directoryroomroomalias),
  [`/directory/list/room/{roomId}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3directorylistroomroomid)
  and
  [`/directory/list/appservice/{networkId}/{roomId}`](https://spec.matrix.org/v1.4/application-service-api/#put_matrixclientv3directorylistappservicenetworkidroomid). ([\#14179](matrix-org/synapse#14179))


Deprecations and Removals
-------------------------

- Remove the experimental implementation of
  [MSC3772](matrix-org/matrix-spec-proposals#3772). ([\#14094](matrix-org/synapse#14094))

- Remove the unstable identifier for
  [MSC3715](matrix-org/matrix-spec-proposals#3715). ([\#14106](matrix-org/synapse#14106),
  [\#14146](matrix-org/synapse#14146))