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)
AAAB1nicLY9bjsMgDEUNNjhp2syGg8TCQR0f6M+R7ftIqE2apGZNrHkTb6XJ+cTtfuJ2PXE7nrjZ/M5uU6ZUpsrkgV6YytTf6rOwLlRulUQiEWnbyFQ5lhA0IEJWqVISOXw9M6UNB2FJmL/EZMcy5oUlGIIhKH1KTIkVbgsVn/OnUfoa8ZjXiO8eTAeTB/rJdA79rT4K6wLPAsdIJIyWhUyVYwnhCshN9qLqIvEOX38zfTYchOWD+Y/YvWMZ88ISDMEQlD4lpsQKt4WKj2dR+g9qCctS