esp_netif/lwip: Implement basic support for vanilla-lwip (2.1.3-REL)

* Reference lwip-2.1.3-REL vanilla lwip version
* Use inherent NETIF callbacks instead of dhcp/ipv6/autoip

components/lwip/CMakeLists.txt

@@ -85,6 +85,7 @@ set(srcs
     "port/esp32/hooks/lwip_default_hooks.c"
     "port/esp32/debug/lwip_debug.c"
     "port/esp32/freertos/sys_arch.c"
+    "port/esp32/sockets_ext.c"
     "port/esp32/netif/wlanif.c")
 
 if(CONFIG_LWIP_PPP_SUPPORT)
@@ -159,15 +160,10 @@ idf_component_register(SRCS "${srcs}"
 # lots of LWIP source files evaluate macros that check address of stack variables
 target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-address)
 
-set_source_files_properties(
-    lwip/src/netif/ppp/ppp.c
-    PROPERTIES COMPILE_FLAGS
-    -Wno-uninitialized
-    )
 set_source_files_properties(
     lwip/src/netif/ppp/pppos.c
     PROPERTIES COMPILE_FLAGS
-    -Wno-implicit-fallthrough
+    -Wno-type-limits
     )
 # "comparison is always false due to limited range of data type" warning
 # when setting CONFIG_LWIP_TCP_WND_DEFAULT to 65535