 <p>Allows a customized timestamp in the access log file name.
           The file is rotated whenever the formatted timestamp changes.
           The default value is <code>.yyyy-MM-dd</code>.
           If you wish to rotate every hour, then set this value
           to <code>.yyyy-MM-dd.HH</code>.
           The date format will always be localized
           using the locale <code>en_US</code>.
        </p>
      </td></tr><tr><td><code class="attributeName">rotatable</code></td><td>
        <p>Flag to 