Merge branch 'mesh/bugfix_fix_layer2_node_connection_issue_v4.2' into 'release/v4.2'

esp_wifi_mesh: fix the issue that layer2 node connect to lower-layer node when FIXED-ROOT root disappeared(backport_v4.2)

See merge request espressif/esp-idf!15730

components/esp_wifi/lib

@@ -1 +1 @@
-Subproject commit 402432bf020a8c6e4d560fe92b7ec1d7f32396fb
+Subproject commit e1319cd03836c9714c5b3bb01fde8535560a2d10

examples/mesh/internal_communication/main/mesh_main.c

@@ -245,6 +245,7 @@ void mesh_event_handler(void *arg, esp_event_base_t event_base,
         mesh_connected_indicator(mesh_layer);
         is_mesh_connected = true;
         if (esp_mesh_is_root()) {
+            esp_netif_dhcpc_stop(netif_sta);
             esp_netif_dhcpc_start(netif_sta);
         }
         esp_mesh_comm_p2p_start();

examples/mesh/manual_networking/main/mesh_main.c

@@ -213,6 +213,7 @@ void mesh_event_handler(void *arg, esp_event_base_t event_base,
         last_layer = mesh_layer;
         mesh_connected_indicator(mesh_layer);
         if (esp_mesh_is_root()) {
+            esp_netif_dhcpc_stop(netif_sta);
             esp_netif_dhcpc_start(netif_sta);
         }
     }