code: public void close() {
  		if (this.sock != null)
  			try {
  				this.sock_in.close();
  				this.sock_out.close();
  				this.sock.close();
  				this.sock=null;
  				this.sock_in=null;
  				this.sock_out=null;
  			} catch (IOException e) {
  			}
  	}
docs: Close the network connection of this Proxy.
  If you re-use the proxy, it will automatically reconnect.