Does not properly close connections.

[garbados]

Currently, the test suite for dat-friend fails due to timeout. When running DEBUG=* npm test I see:

dat-friend stop +5ms
dat-friend stopping root dat +1ms
dat-node leaveNetwork() +415ms
discovery-channel chan=67ed90..fb leave() +7ms
dns-discovery unannounce() 67ed907d93d98cda02241a4ec95e28b047a824f4 +49ms
bittorrent-dht [906635e] destroying +32ms
dat-friend stopping 95a964430e5a5c5203dde674a1873e51f2e8e78995855c1481020f405ee9a772 +4ms
dat-node leaveNetwork() +5ms
discovery-channel chan=67ed90..fb leave() +5ms
dns-discovery unannounce() 67ed907d93d98cda02241a4ec95e28b047a824f4 +5ms
bittorrent-dht [206e05e] destroying +4ms
dat-node Stream close +4ms
dat-node Stream close +1ms
dat-node Stream close +0ms
dat-node Stream close +0ms
dat-node Stream close +1ms
dns-discovery DNS query 188.166.107.197:5300 0Q 0A +1 +6ms
dns-discovery Announce received via SRV 67ed907d93d98cda02241a4ec95e28b047a824f4 67.189.104.224:peer.port +0ms
dat-node Stream close +2ms
dat-node Stream close +1ms
dat-node Stream close +1ms
dat-node Stream close +0ms
dat-node Stream close +0ms
dat-node Stream close +1ms
dat-node Stream close +0ms
bittorrent-dht [5eeca72] found node 67e2c1a532d371d5966cdd7141e807373de2d716 (target: 67ed907d93d98cda02241a4ec95e28b047a824f4) +55ms
bittorrent-dht [5eeca72] found node 67f147ac369bd178886abee631cbeca7a3535220 (target: 67ed907d93d98cda02241a4ec95e28b047a824f4) +101ms
bittorrent-dht [5eeca72] found node 67ec00142af8211a85f177f31bb1079ff272b38e (target: 67ed907d93d98cda02241a4ec95e28b047a824f4) +168ms
bittorrent-dht [5eeca72] found node 67ec6cd6ae529049f1f1bbe9ebb3a6db3c870ce1 (target: 67ed907d93d98cda02241a4ec95e28b047a824f4) +67ms
...

The swarm continues to communicate with these new peers until the test suite times out.

You can see that bittorrent-dht finds peers after dat-node has closed a number of streams. I can't find the problem in dat-node or discovery-swarm, and I hesitate to dive deeper in the dependency chain with no clue of what I'm doing.