ode>Response.getWriter()</code> if no character encoding
      has been specified will result in subsequent calls to
      <code>Response.getCharacterEncoding()</code> returning
      <code>ISO-8859-1</code> and the <code>Content-Type</code> response header
      will include a <code>charset=ISO-8859-1</code> component. (SRV.15.2.22.1)
      </li>
      <li>every request that is associated with a session will cause the
      session's last accessed time to be updated regardless of whether or not
      the r