Fix inconsistencies in guest nick name generation When the setting net/nick is empty, HW generates a guest name. But there were several problems: - Team name did not match guest name - Random guest number was re-rolled multiple times, causing inconsistencies - Guest number was often too large (now capped at 99999)

sky = 99, 51, 43
border = 70, 58, 55
music = Freeway.ogg
clouds = 9
object = Tire, 3, 83, 215, 92, 35, 1, 0, 0, 250, 190
object = AppleSmall, 3, 40, 0, 25, 1, 1, 0, 35, 100, 65
spray = TireDirt, 2
spray = AppleDirt, 5
spray = FishDirt, 4
spray = BottleDirt, 4
flakes = 200, 1, 0, 0, 0