Closed issue by kotoko on void-packages repository

https://github.com/void-linux/void-packages/issues/17728

Description:
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### System

* xuname:  `Void 5.3.18_1 X86_64 GenuineIntel uptodate rFFF`
* packages:
  * `sshguard-2.4.0_1`
  * `openssh-8.1p1_1`
  * `socklog-2.1.0_5`

### Expected behavior
You can start sshguard service using `sv` command.

### Actual behavior
`sv` command times out and kills process.

### Steps to reproduce the behavior
Assuming you have already running ssh server. I am using socklog as logger.
```
$ xbps-install sshguard
$ ln -s /etc/sv/sshguard-socklog /var/service
$ sv up sshguard-socklog
timeout: down: sshguard-socklog: 1s, normally up, want up
```

### Comment
So it looks like sshguard is running as normal program without forking/going to background by itself. It is running as long as executable is executing. On the other hand `sv` expects that all commands end within few seconds or it fails. I did experiment and run as root `sshguard` and tested with failed login attempt to ssh server. It worked as expected (banned me). So it is just problem with running.

Second thing I noticed is that there is passed `-l` (small L) as parameter which is no longer supported. I think there is mandatory file `/etc/sshguard.conf` for configuration.