message: Update WiFiManager.cpp
  Increased size of parLength to 5 so the custom parameter length variable can be up to 9999 long.
diff: @@ -485,7 +485,7 @@ void WiFiManager::handleWifi(boolean scan) {
  }
  page += FPSTR(HTTP_FORM_START);
  - char parLength[2];
  + char parLength[5];
  // add the extra parameters to the form
  for (int i = 0; i < _paramsCount; i++) {
  if (_params[i] == NULL) {
  @@ -497,7 +497,7 @@ void WiFiManager::handleWifi(boolean scan) {
  pitem.replace("{i}", _params[i]->getID());
  pitem.replace("{n}", _params[i]->getID());
  pitem.replace("{p}", _params[i]->getPlaceholder());
  - snprintf(parLength, 2, "%d", _params[i]->getValueLength());
  + snprintf(parLength, 5, "%d", _params[i]->getValueLength());
  pitem.replace("{l}", parLength);
  pitem.replace("{v}", _params[i]->getValue());
  pitem.replace("{c}", _params[i]->getCustomHTML());
  