Messaging: Upsert mentions into unreads.

Messaging: Allow multiple attachment upload.

src/routes/servers/ban_create.rs

@@ -31,11 +31,11 @@ pub async fn req(user: User, server: Ref, target: Ref, data: Json<Data>) -> Resu
 
     let target = target.fetch_user().await?;
     if target.id == user.id {
-        return Err(Error::InvalidOperation)
+        return Err(Error::InvalidOperation);
     }
 
     if target.id == server.owner {
-        return Err(Error::MissingPermission)
+        return Err(Error::MissingPermission);
     }
 
     let mut document = doc! {