Add ArduinoOTA::getHostname() interface

Author: hotchpotch

libraries/ArduinoOTA/ArduinoOTA.cpp

@@ -77,6 +77,10 @@ void ArduinoOTAClass::setHostname(const char * hostname) {
   }
 }
 
+String ArduinoOTAClass::getHostname() {
+  return _hostname;
+}
+
 void ArduinoOTAClass::setPassword(const char * password) {
   if (!_initialized && !_password.length() && password) {
     _password = password;

libraries/ArduinoOTA/ArduinoOTA.h

@@ -31,6 +31,7 @@ class ArduinoOTAClass
     ~ArduinoOTAClass();
     void setPort(uint16_t port);
     void setHostname(const char *hostname);
+    String getHostname();
     void setPassword(const char *password);
     void onStart(OTA_CALLBACK(fn));
     void onEnd(OTA_CALLBACK(fn));