code: func (t *Torrent) Drop() {
  	t.cl.lock()
  	t.cl.dropTorrent(t.infoHash)
  	t.cl.unlock()
  }
docs: // Drop the torrent from the client, and close it. It's always safe to do
  // this. No data corruption can, or should occur to either the torrent's data,
  // or connected peers.