[ap] deliver to actors without a sharedInbox too
https://w3c.github.io/activitypub/#shared-inbox-delivery
Origin servers sending publicly addressed activities to sharedInbox endpoints MUST still deliver to actors and collections otherwise addressed (through to, bto, cc, bcc, and audience) which do not have a sharedInbox and would not otherwise receive the activity through the sharedInbox mechanism.
Edited by les