Merge branch 'bugfix/wifi_fix_some_typos' into 'master'

Fix two WiFi and LWIP typos

See merge request idf/esp-idf!2189

components/esp32/include/esp_wifi_internal.h

@@ -81,7 +81,7 @@ void esp_wifi_internal_free_rx_buffer(void* buffer);
   *
   * @param  wifi_interface_t wifi_if : wifi interface id
   * @param  void *buffer : the buffer to be tansmit
-  * @param  u16_t len : the length of buffer
+  * @param  uint16_t len : the length of buffer
   *
   * @return
   *    - ERR_OK  : Successfully transmit the buffer to wifi driver
@@ -89,7 +89,7 @@ void esp_wifi_internal_free_rx_buffer(void* buffer);
   *    - ERR_IF : WiFi driver error
   *    - ERR_ARG : Invalid argument
   */
-int esp_wifi_internal_tx(wifi_interface_t wifi_if, void *buffer, u16_t len);
+int esp_wifi_internal_tx(wifi_interface_t wifi_if, void *buffer, uint16_t len);
 
 /**
   * @brief     The WiFi RX callback function

components/lwip/Kconfig

@@ -29,7 +29,7 @@ config LWIP_IRAM_OPTIMIZATION
 
 config LWIP_MAX_SOCKETS
     int "Max number of open sockets"
-    range 1 32
+    range 1 16
     default 10
     help
         Sockets take up a certain amount of memory, and allowing fewer