code: func (ctl *HandshakeController) clean() {
  	peerpubkeys := ctl.handshakes
  	for pubkeyid, peertopics := range peerpubkeys {
  		for topic := range peertopics {
  			ctl.cleanHandshake(pubkeyid, &topic, true, true)
  		}
  	}
  }
docs: // Runs cleanHandshake() on all peers and topics