Check for empty string instead of Null to verify if an openid_server_name is pinned.

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

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

This extends the collection with support for seamless authentication at the Jitsi server using Matrix OpenID.

1. New role for installing the [Matrix User Verification Service](https://github.com/matrix-org/matrix-user-verification-service)
2. Changes to Jitsi role: Installing Jitsi Prosody Mods and configuring Jitsi Auth
3. Changes to Jitsi and nginx-proxy roles: Serving .well-known/element/jitsi from jitsi.DOMAIN
4. We updated the Jitsi documentation on authentication and added documentation for the user verification service.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2369

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2363

Fixes the following issue when trying to use the !pm <phone number> command: https://gitlab.com/signald/signald/-/issues/345

Conduit update 0.5.0 fixed the issue, so this is no longer needed.

Related to:

- https://github.com/matrix-org/synapse/pull/14551/files
- https://github.com/matrix-org/synapse/pull/14619/files

Signed-off-by: Joe Kappus <joe@wt.gd>

Please note that This Mjolnir version bump technnically is missing some extra stuff that mjolnir claims we should do but it didnt work when i tried it and well my mjolnir deployment has been running this since release day almost and its fine. No errors in log that are unexpected. (Mjolnir throws errors in the log for anyone who wonders for various things that are fine. Like if a protection is off that is an error. Its due to how matrix-bot-lib works.)

Untested

improve nginxlog matches to group URI's

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2330

Without these:

- `--tags=install-synapse` and `--tags=install-all` would be incomplete
and will not contain Synapse worker configuration

- `--tags=install-synapse-reverse-proxy-companion` and
  `--tags=setup-synapse-reverse-proxy-companion` would not contain
  Synapse worker configuration