We no longer validate that there's an IP address defined.
Seems like Coturn can start without one as well, so there's no need to
require it.
If people populate `matrix_coturn_turn_external_ip_addresses` directly
to specify multiple addresses, they can leave
`matrix_coturn_turn_external_ip_address` empty.
We use the "select not equal to empty string" thing in the for loop
to avoid `matrix_coturn_turn_external_ip_address` leading to
`matrix_coturn_turn_external_ip_addresses: ['']` leading to
`external-ip=` in the Coturn configuration.
Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1741
People often report and ask about these "failures".
More-so previously, when the `docker kill/rm` output was collected,
but it still happens now when people do `systemctl status
matrix-something` and notice that it says "FAILURE".
Suppressing to avoid further time being wasted on saying "this is
expected".
The `halfshot/matrix-hookshot` container images published to Docker Hub
(as of 2022-04-05, at least) are only available for `amd64`, not for
`arm64`. Self-building on arm64 is necessary.
Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1728
It should be noted that a `roiarthurb/matrix-hookshot` container image is available,
which is available for the arm64 platform, but that's non-official and doesn't
contain an amd64 build, so it's of limited use.
This switches the playbook from devture/rust-synapse-compress-state (a
container image which wraps the upstream-prebuilt amd64 binary of
rust-synapse-compress-state) to registry.gitlab.com/mb-saces/rust-synapse-compress-state
(https://gitlab.com/mb-saces/rust-synapse-compress-state), which builds
rust-synapse-compress-state from source and provides a multi-arch image
that currently works on amd64 and arm64.
Ideally, we'll stop using `:latest` and arm32 support will be made
available upstream as well at some point.
Discussed here: https://gitlab.com/mb-saces/rust-synapse-compress-state/-/issues/1