Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/734

Similar to 12867e9f18a3321217083, but for `matrix-coturn` (not
`matrix-nginx-proxy`).

Related to #681 (Github Pull Request)

We'd like the roles to be self-contained (as much as possible).

Thus, the `matrix-nginx-proxy` shouldn't reference any variables from
other roles. Instead, we rely on injection via
`group_vars/matrix_servers`.

Related to #681 (Github Pull Request)

This reverts commit 7d211b71e2.

The multi-arch images are now available, as discussed in #699 (Github Issue).

Fixes #696 (Github Issue)

Regression since 63a49bb2dc.

Related to #685 (Github Issue).

We now automatically expose the APIs when Synapse Admin is enabled.

While v1.22.0 supposedly has multi-arch Docker images
(thanks to https://github.com/matrix-org/synapse/pull/7921),
I can't them on Docker Hub yet, so I'm backing out of this change
for now and letting people fall back to self-building there.

Related to #658 (Github Issue).

Fixes #562 (Github Issue)

Fixes #586 (Github Issue)

Signed-off-by: Tulir Asokan <tulir@maunium.net>

ma1sd 2.4.0 announced experimental support for arm64.
We're making use of those arm64 images instead of self-building.

Fixes #523 (Github Issue).

Related to #529 (Github Issue).

added docs, added seperate service for database, pr comments

We can undo this once https://github.com/ma1uta/ma1sd/issues/44 gets
resolved.

Fixes #494 (Github Issue).

the changes are necessary because certbot images are tagged, so docker does not recognize the necessary architecture

Discussed in #446 (Github Pull Request).

Fixes an error like this:

> synapse.config._base.ConfigError: Cannot reuse as_token across application services

turn tls port update

This will not work yet, as no version of Riot currently supports it.
It's expected to land in riot-web v1.5.16 via matrix-org/matrix-react-sdk#4348.

Hopefully fixes an error like this (which I haven't been able to
reproduce, but..):

> [modules/xmpp/strophe.util.js] <Object.i.Strophe.log>:  Strophe: Error: Failed to construct 'RTCPeerConnection': 'matrix.DOMAIN' is not one of the supported URL schemes 'stun', 'turn' or 'turns'.