BitTorrent Torrent Server
Usage:
http://<root>/url/<unescaped URL for which torrent is desired>
Returns:
One of:
- 200 OK / HTTP Body: .torrent contents
- 301 Moved Permanently / Location: URL of .torrent
- 403 Forbidden / No-Retry: not on whitelist
- 404 Not Found / No-Retry: invalid URL
- 404 Not Found / Retry-After:
- 503 Service Unavailable / No-Retry: URL unavailable