Test:
- Setup Matrix on a VPS with a FQDN and a valid LE certificate, then add these
configs to fail2ban.
- On a production server apply the changes of MR !2296
- Setup the fail2ban filter and jail, then restart fail2ban
- Trying to log in unsuccessfully from FluffyChat leads to a 10 min ban
Result:
`sudo fail2ban-client status matrix-synapse-auth-freedombox` returns the
following output, but the server actually remains accessible in every way.
```
Status for the jail: matrix-synapse-auth-freedombox
|- Filter
| |- Currently failed: 1
| |- Total failed: 11
| `- Journal matches:
`- Actions
|- Currently banned: 1
|- Total banned: 1
`- Banned IP list: MY IP
```
Signed-off-by: nbenedek <contact@nbenedek.me>
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