title: SSI escape HTML output
body: <p>When i use SSI directive is there any way to escape variable with HTML entities?</p>
  
  <pre><code>&lt;META HTTP-EQUIV="Refresh" CONTENT="10; URL="/index.shtml?r=&lt;!--#echo var="HTTP_REFERER" --&gt;"&gt;
  </code></pre>
  
  <p>Thx in advice!</p>