 Checks status of subject. Subject can be  either @MTS@ or 
	@TRANSACTION@. In the first case this checks if  the server is 
	connected to MTS. In the second case, checks if  2pc control is 
	enabled for the current transaction. This function returns status 
	string. For @MTS@ it could be either @connected@ or @disconnected@. 
	For @TRANSACTION@ - either @2pc enabled@ or @2pc disabled@. 