Fix issues building ma1sd Docker image

The when statement is supposed to be on the block, not on the individual task.

It affects all tasks within the block (they're all to be executed when ma1sd is enabled and self-building is requested0.

Fixes #586 (Github Issue)

The tag format used in the `ma1sd` repo have change. Versions no longer
start with 'v', and when building for non-amd64, we also need to strip
off the '-$arch' bit from the Docker image name.

Further, when building the .jar file, `ma1sd` currently names the .jar
based on the project's directory, which we call 'docker-src'. This means
other parts of the `ma1sd` build can't find the .jar file. Remedy this
by ensuring that the dir is called `docker-src/ma1sd`.

Update nginx (1.19.0 -> 1.19.1) and certbot (1.5.0 -> 1.6.0)

Update README.md to rename Riot into Element

Related to #583 (Github Issue).

* updated matrix sms bridge container

* remove force pull

* updated matrix-sms-bridge container

* updated matrix-sms-bridge container

* updated version of matrix-sms-bridge

* updates matrix-sms-bridge

importing-postgres.md: Add 'Troubleshooting' w/workaround for ownership

If a Postgres dump contains ALTER TABLE ... OWNER_TO <username>
statements which set the owner to a username different from
'synapse' the post Postgres import task will fail complaining
about lack of role.

Changing the matrix_postgres_connection_username group var has no
effect. However, the ALTER TABLE statements (and accompanying comments)
can be rewritten to change the username to 'synapse', which permits the
import task to succeed.

From a sample of 1, having the owner set in this was causes no
discernable side effects on the homeserver.

One could also remove the two variables from the docs completely,
because they are set by the playbook automatically.

Error: javax.net.ssl.SSLPeerUnverifiedException: Certificate for
<matrix.<your-domain>> doesn't match any of the subject alternative
names: [<your-domain>]

Fixes #577 (Github Issue).

Fixes #579 (Github Issue).

Fixes #573 (Github Issue).

Fixed repository link for mx-puppet-steam

- https://github.com/icewind1991/mx-puppet-steam is the link that's referenced by the documentation.
- The previous link, https://github.com/matrix-steam/mx-puppet-steam, is invalid/inaccessible to the public.

Fixed Steam link

Run all API self checks in check_mode

swap links

Expose reCAPTCHA variables and document