Suggestion: Use Rspamd instead of Amavisd/ Spamassassin

Hi,

I like to suggest to move away from Amavisd and Spamassassin and use Rspamd instead for iRedMail.

Reason: It is a well supported software (much better than Amavisd), has a lot of needed features (like DMARC and ARC) and has a much better spam dedication rate out of the box.

It would improve iRedMail a lot and also make it future-proof.