Add logging to /var/log/AdGuardHome.err on FreeBSD and OpenBSD

[ainar-g]

Just like on macOS and Linux, let's write stderr and stdout to /var/log/AdGuardHome.err and AdGuardHome.out correspondingly.

[cookiemonsteruk]

I don't doubt that there are issues with higher priority but all *bsd users are unable to diagnose problems with Adguard and often have no choice but to give up or use an alternative in search of the lofty goals Adguard has. That is a good chunk of proficient users with *bsd-based firewalls.
I would very much like to see some logging to be made available.

[ainar-g]

@cookiemonsteruk, we'll bump the priority, thanks. You can already make it write logs by filling in the log_file parameter in AdGuardHome.yaml, but the default behaviour obviously has to be changed.

[cookiemonsteruk]

Well that is wonderful, thank you @ainar-g
I also didn't know of this logging possibility I'll set it up now. Is it a value pair i.e.
log_file /var/log/adguard.log

[cookiemonsteruk]

And are there logging level directives available like INFO, ERROR, DEBUG, etc?

[ainar-g]

@cookiemonsteruk, the default level is info and debug is enabled through the verbose parameter. Please see our documentation. Also, it's better to keep the Q&A in the Discussions. Thanks.

[cookiemonsteruk]

Understood, thank you.