* A torrent should have multiple workers (seed vs download workers?).
* These workers work with connections, if one break they find another one.
  * The connection broker manages connections, choking/unchoking.
    * Connection are linked to a peer & their bitfield.
    * Connections need to be listened to at all times for choke/unchoke/have/timeout/interested
    * A worker takes over a connection to send/receive.
  * The connection broker opens news connections if none are available for
    the workers