This is done via devture_systemd_service_manager_services_list_auto
already.

We expect `--tags=start` to handle systemd reloading, so we don't need
to do it manually each time we install/uninstall a .service file.

update mautrix-telegram 0.12.1 -> 0.12.2

Related to 71de7cd8cd

There was no need to add `synapse` to the list manually
and then add all other additional databases.

When the `synapse` database was the main database, this made sense.
Since a long time ago already, ALL databases are "additional" databases,
so the `synapse` database is part of that list.

We could additional add the main (`matrix`) database to this list,
but there's probably no point in backing that one up.

Update docs on how to use synapse & keycloak OIDC

Use up-to-date example from synapse docs

Add link to keycloak website

Add link to synapse docs on OIDC

Tests were carried out like this:

- `virtualenv3 env`
- `./env/bin/pip install ansible==4.10.0 ansible-core==2.11.7`
- `./env/bin/ansible-playbook .....`

The lowest version of `ansible-core` available on PyPI right now is
2.11.0. That version has trouble with `ansible==4.0.0` though.
The errors we were hitting seemed to be resolved by others online by
using `ansible==4.10.0` instead, which has a minimum `ansible-core`
requirement of `2.11.7`, so that's what we went with.

Older versions of Ansible may work, but.. I'm having trouble
installing them and don't want to spend too much time on digging through
ancient versions and testing them out. People should just learn to run
up-to-date software.

* added dendrite captcha options

* added hcaptcha doc

* proper url

* Apply suggestions from code review

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

* Update main.yml

* renamed captcha vars to new naming scheme

* change vars to new format

* Rename back some incorrect renamed variables

These variables are either not just part of the `client_api` subsection,
or are not even part of that section at all. They shouldn't have been
renamed in baaef2ed616e2645550d9

* Fix up naming inconsistencies

Some of these variables had been renamed in one place,
but not in other places, so it couldn't have worked that way.

* Add validation/deprecation for renamed Dendrite variables

Related to 4097898f885cf4c73, baaef2ed616e2645550, 68f4418092fa8ad
and a0b4a0ae6b2f1f18

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

- forego removing Docker images - it's not effective anyway, because it
  only removes the last version.. which is a drop in the bucket, usually

- do not reload systemd - it's none of our business. `--tags=start`,
  etc., handle this

- combine all uninstall tasks under a single block, which only runs if
  we detect traces (a leftover systemd .service file) of the component.
  If no such .service is detected, we skip them all. This may lead to
  incorect cleanup in rare cases, but is good enough for the most part.

Ansible recently started showing warnings about `crypt` being
deprecated. If one installs `passlib`, the `password_hash` values that
are generated would be different by default. With this patch, we ensure
consistency regardless of which one is used.

After this patch, password hashes (and UUIDs derived from them) will
change once, but they should be stable after that.

These hashes changing is not a problem, because the playbook
changes all references to the new values. Changes are only a problem if
they're done partially and with different tools.
For example:
- `--tags=setup-COMPONENT` with `passlib`
- `--tags=setup-postgres` with `crypt` (no `passlib`)
If so, the Postgres database password's value will differ for the
configuration generated for `COMPONENT`.

The `rounds=` value is arbitrary. It doesn't matter what it is,
as long as it's different than the default for `crypt` (5000)
and the default for `passlib` for `sha512` (656000).

Source (https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_filters.html):

> To ensure idempotency, specify rounds to be neither crypt’s nor passlib’s default, which is 5000 for crypt and a variable value (535000 for sha256, 656000 for sha512) for passlib

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2297

* Exempt Matrix server from ntfy rate limit

Add the matrix fqdn and localhost to ntfy's exemption list.
Also allow all ntfy rate limits to be configured through Ansible
variables.

* Fix names and formatting

* fixes

* tabs not spaces

* Lint

* Use raw tags instead of bracket soup

We had checks to avoid stopping/deleting systemd services for workers
that used to exist and will continue to exist, but we were deleting
config files for workers each time.. Only to recreate them again later.

This lead to:

- too many misleading "changed" tasks
- too much unnecessary work
- potential failures during playbook execution possibly leaving the
  system in a bad state (no worker config files)

Add service declaration to sample traefik config

Update grafana 9.2.5 -> 9.2.6

We need this to control whether `('matrix-' + matrix_homeserver_implementation + '.service')`
would get injected into `devture_systemd_service_manager_services_list_auto`

This was useful when the order of these roles in relation to Synapse
mattered (when we were injecting stuff into Synapse variables during
runtime). This is no longer the case since 0ea7cb5d1812a88, so all of
this can be removed.

These `init.yml` (now `inject_into_nginx_proxy.yml`) tasks do not need
to `always` run. They only need to run for `setup-all` and
`setup-nginx-proxy`. Unless we're dealing with these 2 tags, we can
spare ourselves a lot of work.

This patch also moves the `when` statement from `init.yml` into
`main.yml` in an effort to further optimize things by potentially
avoiding the extra file include.