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)
2dc43ce68721
Increase volume on a number of sounds that were many times quieter than the other voices. Also remove empty space in Ooff1.ogg so it plays at the right time.