* Enable Internal Admin API Access separately from Public access.

* Add Config variable for Draupnir Hijack command

And also make the internal admin API be automatically  activated when this capability is used.

* Apply suggestions from code review

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

* Further Refine Internal Admin API

* Add Non Worker Labels for Internal Admin API

* Variable Rename

* Add validation rules for Internal Synapse admin API

* Add Draupnir Admin API required config validation.

* Override `matrix_synapse_reverse_proxy_companion_container_labels_internal_client_synapse_admin_api_traefik_entrypoints` via group vars

* Wire `matrix_bot_draupnir_admin_api_enabled` to `matrix_bot_draupnir_config_admin_enableMakeRoomAdminCommand` in Draupnir's `defaults/main.yml`

* Remove unnecessary `matrix_bot_draupnir_admin_api_enabled` override from `group_vars/matrix_servers`

The same value is now (more appropriately) defined in Draupnir's `defaults/main.yml` file anyway.

* Add additional condition (`matrix_bot_draupnir_enabled`) for enabling `matrix_synapse_container_labels_internal_client_synapse_admin_api_enabled`

* Use a separate task for validating `matrix_bot_draupnir_admin_api_enabled` when `matrix_bot_draupnir_config_admin_enableMakeRoomAdminCommand`

The other task deals with checking for null and not-blank and can't handle booleans properly.

---------

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

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

This likely breaks QR code login for Synapse-worker setups.

See https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3749

After some checking, it seems like there's `/_synapse/client/oidc`,
but no such thing as `/_synapse/oidc`.

I'm not sure why we've been reverse-proxying these paths for so long
(even in as far back as the `matrix-nginx-proxy` days), but it's time we
put a stop to it.

The OIDC docs have been simplified. There's no need to ask people to
expose the useless `/_synapse/oidc` endpoint. OIDC requires
`/_synapse/client/oidc` and `/_synapse/client` is exposed by default
already.

We'd be adding integration with an internal Traefik entrypoint
(`matrix_playbook_internal_matrix_client_api_traefik_entrypoint`),
so renaming helps disambiguate things.

There's no need for deperecation tasks, because the old names
have only been part of this `bye-bye-nginx-proxy` branch and not used by
anyone publicly.

This also updates validation tasks and documentation, pointing to
variables in the matrix-synapse role which don't currently exist yet
(e.g. `matrix_synapse_container_labels_client_synapse_admin_api_enabled`).

These variables will be added soon, as Traefik labels are added to the
`matrix-synapse` role. At that point, the `matrix-synapse-reverse-proxy-companion` role
will be updated to also use them.