<BLOCK syntax>
<!--- comment --->
</BLOCK>

<BLOCK synopsis>

<p>
This is a simple comment that is not included in the output.  This is useful 
when commenting metatags, since the metatags do not appear the output either. 
Example:
</p>

<htpcode>
<!---  This comment doesn't appear in the HTML file --->
</htpcode>

<p> 
Note that these comments should not include &lt; or &gt;, that is you
should not use it to comment out htp code.  For that purpose use something
like this:
</p>

<htpcode>
<if disabled_because_xyz>
  ...
</if>
</htpcode>

<p>Make sure that the variable is never defined and xyz should be the
reason why you don't want to include this block</p>

</BLOCK>
