Support receiving OutGauge data using SMALL_SSG and OutSim data using SMALL_SSP

[mkapal]

From InSim.txt:

// To request Dashboard Packets from the currently viewed car, send this IS_SMALL:

// ReqI: 0
// SubT: SMALL_SSG		(Start Sending Gauges)
// UVal: interval		(time between updates - zero means stop sending)

// If OutGauge has not been setup in cfg.txt, the SSG packet makes LFS send UDP packets
// if in game, using the OutGauge system as documented near the end of this text file.

// You do not need to set any OutGauge values in LFS cfg.txt - OutGauge is fully
// initialised by the SSG packet.

// The OutGauge packets will be sent to the UDP port specified in the InSimInit packet.