message: add comments for httpupdate callbacks
diff: @@ -3768,6 +3768,11 @@ void WiFiManager::handleUpdating(){
  DEBUG_WM(DEBUG_VERBOSE,"Update file: ", upload.filename.c_str());
  #endif
  + // Update.onProgress(THandlerFunction_Progress fn);
  + // Update.onProgress([](unsigned int progress, unsigned int total) {
  + // Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
  + // });
  +
  if (!Update.begin(maxSketchSpace)) { // start with max available size
  #ifdef WM_DEBUG_LEVEL
  DEBUG_WM(DEBUG_ERROR,F("[ERROR] OTA Update ERROR"), Update.getError());
  @@ -3778,7 +3783,7 @@ void WiFiManager::handleUpdating(){
  }
  // UPLOAD WRITE
  else if (upload.status == UPLOAD_FILE_WRITE) {
  - Serial.print(".");
  + // Serial.print(".");
  if (Update.write(upload.buf, upload.currentSize) != upload.currentSize) {
  #ifdef WM_DEBUG_LEVEL
  DEBUG_WM(DEBUG_ERROR,F("[ERROR] OTA Update WRITE ERROR"), Update.getError());
  