serviced_node_del
traverse_postorder(outnet->serviced, serviced_node_del, NULL);
serviced_node_del(&sq->node, NULL);
serviced_node_del(&sq->node, NULL);
traverse_postorder(outnet->serviced, serviced_node_del, NULL);
serviced_node_del(&sq->node, NULL);
serviced_node_del(&sq->node, NULL);