background wifi scan/connected/reconnect. partial code, incomplete, for testing station mode only (wifi=1)

libraries/SondeLib/Sonde.cpp

@@ -153,6 +153,10 @@ void Sonde::setConfig(const char *cfg) {
 	}
 }
 
+void Sonde::clearIP() {
+  memset(myIP_tiles, 0, 11*8);
+}
+
 void Sonde::setIP(const char *ip, bool AP) {
   memset(myIP_tiles, 0, 11*8);
   int len = strlen(ip);

libraries/SondeLib/Sonde.h

@@ -92,6 +92,7 @@ public:
 	void updateDisplayScanner();
 	void clearDisplay();
 	void setIP(const char *ip, bool isAP);
+	void clearIP();
 };
 
 extern Sonde sonde;