optimization TCPv6 connect

components/lwip/lwip

@@ -1 +1 @@
-Subproject commit dd3b301750f19c9f15248ac32d366cd41c6b3225
+Subproject commit 5c181728c894d8c051070b1cf21c55a6222fc64b

components/lwip/port/esp32/netif/wlanif.c

@@ -94,6 +94,12 @@ low_level_init(struct netif *netif)
 #endif
 #endif
 
+#if ESP_IPV6
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+  netif->flags |= NETIF_FLAG_MLD6;
+#endif
+#endif
+
 #if !ESP_L2_TO_L3_COPY
     netif->l2_buffer_free_notify = lwip_netif_wifi_free_rx_buffer;
 #endif