Serialize group topology lazily through a cancellable backpressure sender

src/routing_layer/topo_node.c

@@ -1207,7 +1207,7 @@ int topo_node_update_my_addresses(struct UTUN_INSTANCE* instance) {
                     struct ll_entry* se = g->senders_list->head;
                     while (se) {
                         struct TOPO_GROUP_CONN_ITEM* item = (struct TOPO_GROUP_CONN_ITEM*)se->data;
-                        if (item && item->conn) topo_group_send_nodeinfo(g, g->local_node, item->conn, 0);
+                        if (item && item->conn) topo_group_send_nodeinfo(g, g->local_node, item->conn);
                         se = se->next;
                     }
                 }