FIx esp32 updates

Webserver now builtin to esp32 lib, esp32 persistent still not implemented properly, fixes erase again, fixes save again

README.md

@@ -16,12 +16,11 @@ First attempt at a library. Lots more changes and fixes to do. Contributions are
 
 [https://github.com/esp8266/Arduino](https://github.com/esp8266/Arduino)
 
-**This works with the ESP32 Arduino platform with staging , with caveats below** 
+**This works with the ESP32 Arduino platform with staging** 
 
 [https://github.com/espressif/arduino-esp32](https://github.com/espressif/arduino-esp32)
 
 ### Known Issues
-* :exclamation: ESP32 must be patched with webserver library, see [https://github.com/tzapu/WiFiManager/issues/513](https://github.com/tzapu/WiFiManager/issues/513)
 * Documentation needs to be updated, see [https://github.com/tzapu/WiFiManager/issues/500](https://github.com/tzapu/WiFiManager/issues/500)
 
 ## Contents

WiFiManager.cpp

@@ -165,6 +165,7 @@ WiFiManager::~WiFiManager() {
   if (_params != NULL){
     DEBUG_WM(DEBUG_DEV,F("freeing allocated params!"));
     free(_params);
+    _params = NULL;
   }
 
   DEBUG_WM(DEBUG_DEV,F("unloading"));
@@ -173,7 +174,10 @@ WiFiManager::~WiFiManager() {
 void WiFiManager::_begin(){
   if(_hasBegun) return;
   _usermode = WiFi.getMode();
+
+  #ifndef ESP32
   WiFi.persistent(false); // disable persistent so scannetworks and mode switching do not cause overwrites
+  #endif
 }
 
 void WiFiManager::_end(){
@@ -206,6 +210,10 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
     return false;
   }
 
+  #ifdef ESP32
+  if(esp32persistent) WiFi.persistent(false); // disable persistent for esp32 after esp_wifi_start or else saves wont work
+  #endif
+
   _usermode = WIFI_STA;
 
   // no getter for autoreconnectpolicy before this
@@ -2362,7 +2370,7 @@ bool WiFiManager::WiFi_eraseConfig() {
       bool ret;
       WiFi.mode(WIFI_AP_STA); // cannot erase if not in STA mode !
       WiFi.persistent(true);
-      ret = WiFi.disconnect(true);
+      ret = WiFi.disconnect(true,true);
       WiFi.persistent(false);
       return ret;
     #endif

WiFiManager.h

@@ -48,12 +48,11 @@
     #define WM_WIFIOPEN   WIFI_AUTH_OPEN
 
     #ifndef WEBSERVER_H
-        #warning "WEBSERVER not implemented in espressif/esp32, see readme notes"
         #ifdef WM_WEBSERVERSHIM
             #include <WebServer.h>
         #else
             #include <ESP8266WebServer.h>
-            // Forthcoming official
+            // Forthcoming official ?
             // https://github.com/esp8266/ESPWebServer
         #endif
     #endif