Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2090

* Add task to configure a standalone JVB on a different server

* add missing file

* set nginx config

* update prosody file and expose port 5222

* change variable name to server id

* formatting change

* use server id of jvb-1 for the main server

* adding documentation

* adding more jvbs

* rename variable

* revert file

* fix yaml error

* minor doc fixes

* renaming tags and introducing a common tag

* remove duplicates

* add mapping for jvb to hostname/ip

* missed a jvb_server

* Update roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2

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

* PR review comments and additional documentation

* iterate on dict items

* Update docs/configuring-playbook-jitsi.md

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

* Update docs/configuring-playbook-jitsi.md

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

* Update docs/configuring-playbook-jitsi.md

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

* Update docs/configuring-playbook-jitsi.md

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

* Update docs/configuring-playbook-jitsi.md

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

* Update docs/configuring-playbook-jitsi.md

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

* Update docs/configuring-playbook-jitsi.md

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

* adding documentation around the xmpp setting

* add common after

* reduce the number of services during init of the additional jvb

* remove rogue i

* revert change to jitsi init as it's needed

* only run the jvb service on the additional jvb host

* updating docs

* reset default and add documentation about the websocket port

* fix issue rather merge with master

* add missing role introduced in master

* this role is required too

* Adding new jitsi jvb playbook, moving setup.yml to matrix.yml and creating soft link

* updating documentation

* revert accidental change to file

* add symlink back to roles to aid running of the jitsi playbook

* Remove extra space

* Delete useless playbooks/roles symlink

* Remove blank lines

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

This fixes a regression since the change done in c1c152f7ac.
When another role (say `matrix-jitsi`) included `roles/custom/matrix-base/tasks/util/ensure_openssl_installed.yml`,
which then included `{{ role_path }}/tasks/util/ensure_openssl_installed_DISTRO.yml`,
that `role_path` variable would end up being the parent role
(`matrix-jitsi`) and not the `matrix-base` role, so we'd get a failure.

An alternative solution may have been to avoid using `role_path`, but
importing roles properly (like we've done in this patch) sounds like a better way.

Unfortunately, `import_role` fails if `tasks_from` is something like
`util/ensure_openssl_installed` (containing a `/`), so I had to move
these utils out of `util/`.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2228

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.