Name: query_direction - get the direction to an exit filename

Syntax:
	#include <room2.h>
	string query_direction(string filename)

Description:
	The query_direction call returns the direction to an exit filename
	by searching through the exits array, set with set_exits.

Return value:
	If filename is found in the exits array, the appropriate direction
	string is returned, else the return value is 0

Examples:
	string where;
	where=query_direction("players/nobody/workroom");

See also: room/set_exits, room/query_dest_dir