Added ESP32 compatible methods for setting/getting hostname (#7900)

Author: drzony

Diff for: cores/esp8266/LwipIntf.cpp

@@ -64,6 +64,15 @@ String LwipIntf::hostname(void)
     return wifi_station_get_hostname();
 }
 
+/**
+    Get ESP8266 station DHCP hostname
+    @return hostname
+*/
+const char* LwipIntf::getHostname(void)
+{
+    return wifi_station_get_hostname();
+}
+
 /**
     Set ESP8266 station DHCP hostname
     @param aHostname max length:24

Diff for: cores/esp8266/LwipIntf.h

@@ -34,6 +34,12 @@ class LwipIntf
         return hostname(aHostname.c_str());
     }
     bool hostname(const char* aHostname);
+    // ESP32 API compatibility
+    bool setHostname(const char* aHostName)
+    {
+        return hostname(aHostName);
+    }
+    const char* getHostname();
 
 protected: