param.default_priority and param.default_weight.
(adjust_penalty): Use the weight to reduce the penalty.
(get_scheduling): Return the actual scheduling information from
	the connection.
(set_scheduling): Check the priority and weight against
	param.max_priority and param.max_weight.  Allow the user to
	change them, as long as it is done within those limits.  Store
	the new values in the connection.  Note: the current
	implementation cannot handle more than one priority.  The
	check for that is made in server-config.c.