Packet Size Doubler

A simple mod for doubling the size of allowed packets. This mod could be used in mod packs for increasing the number of mods. Solves the issues related to: Internal Exception io.netty.handler.codec.Decoder.Exception: Badly compressed packet - size of 2552936 is larger than protocol maximum of 2097152  and Internal Exception: io.netty.handler.codec.EncoderException: java.lang.IllegalArgumentException: Packet too big (is 8562867, should be less than 8388608)