Shared Secret Auth double puppeting still works for these bridges, but
is deprecated and will go away in the future.

Related to 0241c71a4c

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3270#issuecomment-2143782962

With this change, it should be possible for people to adjust the Docker
dependency from `docker.service` to something else (e.g. `pkg-ContainerManager-dockerd.service`),
or to completely eliminate it by setting `devture_systemd_docker_base_docker_service_name` to an empty string.

This makes it easier for people to use the playbook against a Synology DSM server.

commit cf8637efac
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sun Mar 24 19:14:57 2024 +0200

    Make devture_systemd_docker_base_ipv6_enabled automatically reconfigure geerlingguy/ansible-role-docker

    Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3218

commit dc7af3bc7d
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sun Mar 24 19:10:31 2024 +0200

    Replace matrix_ipv6_enabled with devture_systemd_docker_base_ipv6_enabled

    Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3218

commit 07e900d6a2
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sun Mar 24 19:01:51 2024 +0200

    Improve matrix_ipv6_enabled comments

commit 3f03ca7f69
Author: Tilo Spannagel <development@tilosp.de>
Date:   Sat Mar 9 19:27:50 2024 +0000

    Add setting to enable ipv6

Signed-off-by: gardar <gardar@users.noreply.github.com>

We still remain on v0.1.0 for now, even though that's quite old nowadays
and the bridge is moving quickly.

Still, one could now pin to a specific commit like this:

```yml
matrix_mautrix_meta_messenger_version: 682c4d75b0
matrix_mautrix_meta_instagram_version: 682c4d75b0
```

* mautrix-meta: enable spaces; add a hint into the display name

* use the meta mode to determine displayname suffix

* Allow for people to easily unset the mautrix-meta displayname suffix

Previously, unsetting `matrix_mautrix_meta_messenger_bridge_displayname_suffix`
or (`matrix_mautrix_meta_instagram_bridge_displayname_suffix`) variable would
make you end up witha trailing space in `displayname`.

It's possible that mautrix-meta trims this, but I haven't checked. It's
better not to risk it anyway.

---------

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

Related to: https://github.com/mautrix/facebook/issues/332

Fixes: https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3138