Provide an option to continue seeding even after download completes

[hackergrrl]

I noticed that peerflix ceases uploading to peers once my download finishes. I'd really like to continue seeding while I watch my downloaded video; could this be an option or -- dare I ask -- a default?

[mafintosh]

I would have no problem with this being the default. I'm pretty sure it stops seeding because of this, https://github.com/mafintosh/peerflix/blob/master/app.js#L86-L92. Would you be interested in doing a PR?

[hackergrrl]

I tried removing the code that stopped the engine on uninterested, but the only difference it made was that peerflix would keep on connecting to and then disconnecting peers once I finished downloading. Perhaps there's something deeper, in torrent-stream, that's keeping it from seeding?

[mafintosh]

Yeah - it's probably torrent-stream has a choke timeout that is triggered since we do not wan't any more data. torrent-stream then disconnects the peer. It probably shouldn't do this when it is seeding.