Incorrect protocol information in readme

[sirsquidness]

Hello!

In the last paragraph of the readme, The protocol uses udp and the packets sometimes get lost. RCON uses TCP. It is true that sometimes TCP packets get lost, so a partial response is still possible, but it is less likely than if this were a UDP thing since TCP will keep trying to resend the packet until either the received acknowledges that it was received, or a timeout happens.

The code is correct, just not the one line in the docs.

Thanks for a useful library! :)