improvement: bug fixes and refactors

- power level content override adds to the default event instead of
replacing it
- sending code refactored to make edus possible
- remove presence events when restarting conduit
- remove room_id field from read receipts over /sync
- handle incoming read receipts
- fix array bounds bug in server_server.rs

src/database.rs

@@ -198,7 +198,7 @@ impl Database {
             },
             sending: sending::Sending {
                 servernamepduids: db.open_tree("servernamepduids")?,
-                servercurrentpdus: db.open_tree("servercurrentpdus")?,
+                servercurrentevents: db.open_tree("servercurrentevents")?,
                 maximum_requests: Arc::new(Semaphore::new(config.max_concurrent_requests as usize)),
             },
             admin: admin::Admin {
@@ -217,6 +217,9 @@ impl Database {
             _db: db,
         };
 
+        // This data is probably outdated
+        db.rooms.edus.presenceid_presence.clear()?;
+
         db.admin.start_handler(db.clone(), admin_receiver);
 
         Ok(db)