added public cleanAPlist() function (#4107)

* added public cleanAPlist() function.

* Update ESP8266WiFiMulti.cpp

* Update ESP8266WiFiMulti.cpp

* Add cleanAPlist to object method header

Author: NayanKaran

libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp

@@ -38,6 +38,10 @@ bool ESP8266WiFiMulti::addAP(const char* ssid, const char *passphrase) {
     return APlistAdd(ssid, passphrase);
 }
 
+void ESP8266WiFiMulti::cleanAPlist(void) {
+    APlistClean();
+}
+
 bool ESP8266WiFiMulti::existsAP(const char* ssid, const char *passphrase) {
     return APlistExists(ssid, passphrase);
 }

libraries/ESP8266WiFi/src/ESP8266WiFiMulti.h

@@ -57,6 +57,8 @@ class ESP8266WiFiMulti {
 
         wl_status_t run(void);
 
+        void cleanAPlist(void);
+
     private:
         WifiAPlist APlist;
         bool APlistAdd(const char* ssid, const char *passphrase = NULL);