MUC-PM Carbons matcher misdetects direct messages to Biboumi users as PMs
Even after the last improvements regarding MUC-PM detection, there are some significant problems with it:
It will send an IQ to the domain of the other user on each incoming Carbon, sent or received. The
DEBUG:disco:Caching disco info result for <domain>has no effect.
It will not check all local knowledge (open tabs other than MucTab)
It will treat direct messages with IRC users (email@example.com) as PMs because Biboumi is advertized as a MUC service.