This is an attempt at optimizing service startup.

The effect is most pronounced when many services are restarted one by one.
The systemd service manager role sometimes does this - for example when `just install-service synapse` runs.
In such cases, a 5-second delay for each Synapse worker service
(or other bridge/bot service that waits on the homeserver) quickly adds up to a lot.

When services are all stopped fully and then started, the effect is not so pronounced, because
`matrix-synapse.service` starts first and pulls all worker services (defined as `Wants=` for it).
Later on, when the systemd service manager role "starts" these worker services, they're started already.
Even if they had a 5-second wait each, it would have happened in parallel.

* Inital work, copeid from mautrix-amp PR

* Some fixes leftover code copeid over from whatsapp

* Got it to run and register

* Fixed service issue with docker image

* I now realize I need 2 roles wsproxy and imessage

* Got someting working, still rough

* Closer to working but still not working

* reverting ports

* Update main.yml

* Add matrix-nginx-proxy config for mautrix-wsproxy

* Changed

* Add back file

* fix for error hopefully

* Changed the the way nginx was recieved

* basically did not add anything ugh

* Added some arguments

* just trying stuff now

* Ugh i messed up port number

* Changed docs

* Change dns config

* changed generic secret key

* Testing new nginx proxy

* test

* Fix linting errors

* Add mautrix syncproxy to wsproxy for Android SMS

* WIP

* Move wsproxy to custom

* Squashed commit of the following:

commit 943189a9aa
Merge: 4a229d68 f5a09f30
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sun Nov 13 08:54:32 2022 +0200

    Merge pull request #2259 from throny/patch-3

    warn users about upgrading to pg15 when using borg

commit 4a229d6870
Merge: 9b326e08 c68def08
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sun Nov 13 08:53:13 2022 +0200

    Merge pull request #2260 from etkecc/patch-117

    Update ntfy 1.28.0 -> 1.29.0

commit f5a09f30b7
Author: throny <m.throne12@gmail.com>
Date:   Sat Nov 12 23:48:57 2022 +0100

    Update maintenance-postgres.md

commit b12cdbd99d
Author: throny <m.throne12@gmail.com>
Date:   Sat Nov 12 23:40:46 2022 +0100

    Update maintenance-postgres.md

commit c68def0809
Author: Aine <97398200+etkecc@users.noreply.github.com>
Date:   Sat Nov 12 22:01:31 2022 +0000

    Update ntfy 1.28.0 -> 1.29.0

commit adbc09f152
Author: throny <m.throne12@gmail.com>
Date:   Sat Nov 12 11:20:43 2022 +0100

    warn users about upgrading to pg15 when using borg

* Fix linting errors

* Cleanup after merge

* Correct outdated variable names

* Enable both Android and iMessage with wsproxy

* Restructure wsproxy service defs and nginx config

* Fix linter errors

* Apply suggestions from code review

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Fix comments for documentation, volumes and ports

* Correct mount syntax

* Complete network and traefik support for wsproxy

* Remove wsproxy data_path

* Fix wsproxy service definitions

* Actually include syncproxy service

* Remove wsproxy PathPrefix, it needs a subdomain

There's no setting in the iMessage bridge that allows a path.
Also don't bind port by default, wsproxy has no TLS.
Syncproxy should never expose a port, it's only internal.

---------

Co-authored-by: hanthor <jreilly112@gmail.com>
Co-authored-by: Miguel Alatzar <miguel@natrx.io>
Co-authored-by: Shreyas Ajjarapu <github.tzarina@aleeas.com>
Co-authored-by: Slavi Pantaleev <slavi@devture.com>

This paves the way for installing other roles into `roles/galaxy` using `ansible-galaxy`,
similar to how it's done in:

- https://github.com/spantaleev/gitea-docker-ansible-deploy
- https://github.com/spantaleev/nextcloud-docker-ansible-deploy

In the near future, we'll be removing a lot of the shared role code from here
and using upstream roles for it. Some of the core `matrix-*` roles have
already been extracted out into other reusable roles:

- https://github.com/devture/com.devture.ansible.role.postgres
- https://github.com/devture/com.devture.ansible.role.systemd_docker_base
- https://github.com/devture/com.devture.ansible.role.timesync
- https://github.com/devture/com.devture.ansible.role.vars_preserver
- https://github.com/devture/com.devture.ansible.role.playbook_runtime_messages
- https://github.com/devture/com.devture.ansible.role.playbook_help

We just need to migrate to those.

People often report and ask about these "failures".
More-so previously, when the `docker kill/rm` output was collected,
but it still happens now when people do `systemctl status
matrix-something` and notice that it says "FAILURE".

Suppressing to avoid further time being wasted on saying "this is
expected".

Reverts b1b4ba501fdfaa, 90c9801c560b6, a3c84f78ca9c65a, ..

I haven't really traced it (yet), but on some servers, I'm observing
`ansible-playbook ... --tags=start` completing very slowly, waiting
to stop services. I can't reproduce this on all Matrix servers I manage.
I suspect that either the systemd version is to blame or that some
specific service is not responding well to some `docker kill/rm` command.

`ExecStop` seems to work great in all cases and it's what we've been
using for a very long time, so I'm reverting to that.

ExecStopPost should allow us to clean up (docker kill + docker rm)
even if the ExecStart (docker run ..) command failed, and not just after
a graceful service stop was initiated.

Source: https://www.freedesktop.org/software/systemd/man/systemd.service.html#ExecStopPost=

These are just defensive cleanup tasks that we run.
In the good case, there's nothing to kill or remove, so they trigger an
error like this:

> Error response from daemon: Cannot kill container: something: No such container: something

and:

> Error: No such container: something

People often ask us if this is a problem, so instead of always having to
answer with "no, this is to be expected", we'd rather eliminate it now
and make logs cleaner.

In the event that:
- a container is really stuck and needs cleanup using kill/rm
- and cleanup fails, and we fail to report it because of error
suppression (`2>/dev/null`)

.. we'd still get an error when launching ("container name already in use .."),
so it shouldn't be too hard to investigate.

> WARNING: Error loading config file: .dockercfg: $HOME is not defined

.. which appeared in Docker 20.10.

The Docker 19.04 -> 20.10 upgrade contains the following change
in `/usr/lib/systemd/system/docker.service`:

```
-BindsTo=containerd.service
-After=network-online.target firewalld.service containerd.service
+After=network-online.target firewalld.service containerd.service multi-user.target
-Requires=docker.socket
+Requires=docker.socket containerd.service
Wants=network-online.target
```

The `multi-user.target` requirement in `After` seems to be in conflict
with our `WantedBy=multi-user.target` and `After=docker.service` /
`Requires=docker.service` definitions, causing the following error on
startup for all of our systemd services:

> Job matrix-synapse.service/start deleted to break ordering cycle starting with multi-user.target/start

A workaround which appears to work is to add `DefaultDependencies=no`
to all of our services.

Depending on the distro, common commands like sleep and chown may either
be located in /bin or /usr/bin.

Systemd added path lookup to ExecStart in v239, allowing only the
command name to be put in unit files and not the full path as
historically required. At least Ubuntu 18.04 LTS is however still on
v237 so we should maintain portability for a while longer.