UPnP ports not removed from router on exit

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libtorrent 0.16.13+svn9537 with qbittorrent 3.1.5 on Windows (unknown version).

User reports that the upnp ports aren't removed from router on exit. I confirm 
that qbt calls the appropriate code on exit. Probably a quirky router.

Here is the actual report: 
https://github.com/qbittorrent/qBittorrent/issues/1340

I'll redirect the user here.

Original issue reported on code.google.com by hammered...@gmail.com on 31 Jan 2014 at 7:00

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The best diagnostics would be a wireshark log of the UPnP startup and shutdown 
traffic.

Original comment by arvid.no...@gmail.com on 31 Jan 2014 at 7:35

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[GoogleCodeExporter]

I also have this problem with the Deluge bit-torrent client (which uses 
libtorrent) with a TP-Link router.  Whereas there is no such problem with the 
Transmission client.  In the hope it might be of some help, I have provided a 
link (I get a "Issue attachment storage quota exceeded" even though I've never 
uploaded an attachment here!) to a Wireshark capture of Deluge being started 
and closed - http://ubuntuone.com/3XnUG80ydcCWpYqUqwUR12

Original comment by clifford...@gmail.com on 29 Mar 2014 at 11:53

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