Golang implementation of mmproxy

 'go-mmproxy' is a standalone application that unwraps HAProxy's
 PROXY-protocol so that the TCP connection to the end server comes from
 client's - instead of proxy server's - IP address and port number.
 .
 This is a Golang reimplementation of mmproxy created to improve on
 mmproxy's runtime stability while providing potentially greater
 performance in terms of connection and packet throughput.