crossdock/client/client.go
func (c *Client) Start() error {
	if err := c.listen(); err != nil {
		return err
	}
	go func() {
		http.Serve(c.listener, c.mux)
	}()
	return nil
}
func (c *Client) Start() error {
	if err := c.listen(); err != nil {
		return err
	}
	go func() {
		http.Serve(c.listener, c.mux)
	}()
	return nil
}
// Start begins a Crossdock client in the background.