Update dkim.md with check_local description

[createyourpersonalaccount]

No description provided.

[createyourpersonalaccount]

I checked that this line https://github.com/rspamd/rspamd/blob/09756fbbc2d5901958b7099420dd648d627b40ee/src/plugins/dkim_check.c#L1164C88-L1165 mentions check_local but it's not in the docs for the DKIM module.

Incidentally, I still get "skip DMARC checks as either SPF or DKIM were not checked" in my logs, and since now DKIM is checked, how do I enable SPF check for local network?

Edit: I can use check_local = true; in spf.conf and dmarc.conf as well. Should it be mentioned in those modules too? There's also check_auth.

[createyourpersonalaccount]

@moisseev Opinion on this?

[moisseev]

@createyourpersonalaccount I fully agree that every configuration option should be documented. The check_authed and check_local aren’t limited to just DKIM/SPF/DMARC. You can run search the repo to list all modules that supports them.

[createyourpersonalaccount]

@moisseev It's also inconsistent: for milter_headers.conf it is called skip_local instead of check_local and the boolean value is flipped.