User Agent String #10
Description
We should send a user agent string similar to the one sent by Google's feed fetcher, containing the number of subscribers subscribed to the feed.
Google sends something like this:
User-Agent: Feedfetcher-Google; (+http://www.google.com/feedfetcher.html; 4 subscribers; feed-id=1794595805790851116)
We probably should change the name and URL a bit because we aren't really Google Reader, but keep the same format.