new sshxproxy version

I know most people doesn't need this, but sometimes it is quite handy, so today I released a new version of sshxproxy which is a script that stablishes a connection through a proxy so that we can ssh through it (basically it launches a socat which stablishes the connection and then the ssh against the socat). This version has wpad auto proxy detection (or something like it, as I didn't implement a javascript interpreter for this :-)