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bz_setPlayerSpawnable
bool bz_setPlayerSpawnable (int playerID, bool spawn)
Minimum API Version: 2.4.3 
Marks this player as allowed to spawn or not allowed to spawn.
Parameters: 
playerID  -  The id of the player to mark as spawnable. 
spawn  -  Mark them as able to spawn or not spawn 
Returns: 
True if target player was valid and setting the spawnablity was successful