Events/get special

The get_special event is called in numerous places, and is used to get a list of all players who have special powers (generally, this means they have a role-specific command they can use either during day or night).

Event callback

 * prevent_default has no effect for this event
 * : The event object
 * : The IRC connection
 * : Reference to the src.settings module

Event data
The special set should be added to with players who have special powers. It is initialized to an empty set.