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 = 21, 20, 38
border = 242, 230, 124
music = pirate.ogg
clouds = 9
object = anchor, 3, 65, 258, 80, 2, 1, 0, 0, 240, 215
object = plant1, 3, 10, 192, 60, 2, 1, 33, 0, 149, 152
object = plant2, 3, 55, 218, 30, 2, 1, 0, 0, 240, 175
object = plant3, 3, 20, 0, 60, 1, 1, 0, 15, 100, 44
object = plant4, 3, 78, 5, 2, 60, 1, 0, 0, 65, 110
flakes = 100, 2, 500, 100, 300