@Override
    protected void doTrace(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
    }
@see jakarta.servlet.http.HttpServlet#doTrace(jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse)
src/nu/validator/servlet/VerifierServlet.java