Since you put periods at the end of the some of the comments, I put them on all the ones that had more than one word. If you don't like it please remove from all comments - be consistent.
Line 490: it basically says "URL where the URL is". Is there a better definition?
You switch between "long poll, "longpoll", "longPoll" and "LongPoll" constantly. I picked "long poll" as it seemed the accepted form.