* Ensure the list media admin API is always available

This API is required for some external media repo implementations to operate (mostly for doing quarantine operations on a room).

* changelog

Adjust su-exec to only be used if needed.

If UID == getuid() and GID == getgid() then we do not need to su-exec, and chmod will not work.

* Ensure an auth instance is available to ListMediaInRoom

Fixes https://github.com/matrix-org/synapse/issues/5737

* Changelog

Remove all the "double return" statements which were a result of us removing all the instances of

```
defer.returnValue(...)
return
```

statements when we switched to python3 fully.

Trace device list changes.

These methods were part of the v1 C/S API. Remove them as they are no longer used by any code paths.

* fix thumbnail storage location

Signed-off-by: Lorenz Steinert <lorenz@steinerts.de>

* Add changelog file.

Signed-off-by: Lorenz Steinert <lorenz@steinerts.de>

* Update Changelog

Signed-off-by: Lorenz Steinert <lorenz@steinerts.de>

Signed-off-by: Aaron Raimist <aaron@raim.ist>

This reverts commit 4765f0cf.

Python will return a tuple whether there are parentheses around the returned values or not.

I'm just sick of my editor complaining about this all over the place :)

Adds a flag to `/versions`' `unstable_features` section indicating that this Synapse understands what an `id_access_token` is, as per https://github.com/matrix-org/synapse/issues/5927#issuecomment-523566043

Fixes #5927

This reverts commit 71fc0406.

This broke 3PID invites as #5892 was required for it to work correctly.

Exempt support users from consent

* Let synctl use a config directory.

Fixes https://github.com/matrix-org/synapse/issues/5861

Adds support for the v2 lookup API as defined in [MSC2134](https://github.com/matrix-org/matrix-doc/pull/2134). Currently this is only used for 3PID invites.

Sytest PR: https://github.com/matrix-org/sytest/pull/679

Template config files

* Imagine a system composed entirely of x, y, z etc and the basic operations..

Wait George, why XOR? Why not just neq?

George: Eh, I didn't think of that..

Co-Authored-By: Erik Johnston <erik@matrix.org>

Some of the caches on worker processes were not being correctly invalidated
when a room's state was changed in a way that did not affect the membership
list of the room.

We need to make sure we send out cache invalidations even when no memberships
are changing.

Add GET method to admin API /users/@user:dom/admin

MSC2197 Search Filters over Federation

Refactor MatrixFederationAgent to retry SRV.

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

* Allow schema deltas to be engine-specific

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

* Newsfile

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

* Code style (Black)

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

Increase profile display name limit

Add config option to sign remote key query responses with a separate key.

public_base_url is actually public_baseurl

Admin API: Set adminship of a user