xr809 mac change fix/hack as requested by ahkashinobi from Elektroda com

src/httpserver/http_fns.c

@@ -934,6 +934,7 @@ int http_fn_cfg_mac(http_request_t *request) {
         } else {
             poststr(request,"<h4> MAC change error?</h4>");
         }
+		CFG_Save_IfThereArePendingChanges();
     }
 
     WiFI_GetMacAddress((char *)mac);

src/httpserver/http_tcp_server.c

@@ -20,6 +20,8 @@
 
 #define DISABLE_SEPARATE_THREAD_FOR_EACH_TCP_CLIENT 1
 
+#endif
+
 static void tcp_server_thread( beken_thread_arg_t arg );
 static void tcp_client_thread( beken_thread_arg_t arg );