Make sure posts are marked public when https://www.w3.org/ns/activitystreams#Public appears in the cc: section

src/model/status.c

@@ -308,6 +308,11 @@ bool status_sync_from_activity_pub( struct status* s, struct ap_object* act )
 			is_public = true;
 		}
 	}
+	for( int i = 0; i < act->cc.count; ++i ) {
+		if( 0 == strcmp( act->cc.items[i], "https://www.w3.org/ns/activitystreams#Public" ) ) {
+			is_public = true;
+		}
+	}
 
 	if( is_public ) {
 		s->visibility = status_visibility_public;