Dont close the channel more than once.
Dont close the channel more than once.

closed() was unsafe so it was removed from the language, so I'm using sync.Once
instead.

FlexibleBroadband/Taipei-Torrent,ansonwzj/CPSC416Taipei,Dataman-Cloud/Taipei-Torrent,rakoo/rakoshare,beni55/Taipei-Torrent,rakoo/rakoshare,ansonwzj/CPSC416Taipei,FlexibleBroadband/Taipei-Torrent,beni55/Taipei-Torrent,nictuku/Taipei-Torrent,Dataman-Cloud/Taipei-Torrent,zyxar/taipei,nictuku/Taipei-Torrent