fix an Issue when more then one RCON-pakets are in data-buffer

[fastrde]

hi pushrax,

thanks for your work. You helped me so I want to help you ;-)

in socketOnData you handle each buffer as only one RCON-packet.
When you have for example logging enabled you can have multiple packets in the buffer, so the line

var str = data.toString('utf8', 12);

cuts the header of the first RCON-Packet but dont touch the headers of the other packets in buffer and emit the packets as one big packet.

This fix read the structure of the RCON-Packets descriped on https://developer.valvesoftware.com/wiki/Source_RCON_Protocol
and splits the buffer in single packets.

lg

fastrde

[pushrax]

Thanks for your contribution 🍉