new glossary item "hash"

      See: <a href="handler.html">Apache's Handler Use</a>

   </dd>

   <dt><a name="hash">Hash</a></dt>

   <dd>A mathematical one-way, irreversable algorithm generating a string with

      fixed-length from another string of any length. Different input strings

      will usually produce different hashes (depending on the hash function).

   </dd>

    <dt><a name="header">Header</a></dt>

    <dd>The part of the <glossary ref="http">HTTP</glossary> request and

      response that is sent before the actual content, and that contains