"auto-hyperlink", "autohyperlink", 1, 0);
  @ <p>Enable hyperlinks (the equivalent of the "h" permission) for all users
  @ including user "nobody", as long as (1) the User-Agent string in the
  @ HTTP header indicates that the request is coming from an actual human
  @ being and not a a robot or spider and (2) the user agent is able to
  @ run Javascript in order to set the href= attribute of hyperlinks.  Bots
  @ and spiders can forge a User-Agent string that makes them seem to be a
  @ normal browser and they can run javascript just like browsers.  But most 
  @ bots do not go to that much trouble so this is normally an effective defense.</p>
  @
  @ <p>You do not normally want a bot to walk your entire repository because
  @ if it does, your server will end up computing diffs and annotations for
  @ every historical version of every file and creating ZIPs and tarballs of
  @ every historical check-in, which can use a lot of CPU and bandwidth
  @ even for relatively small projects.</p>
  @ 
  @ <p>Additional parameters that control this behavior:</p>
  @ <blockquote>
  onoff_attribute("Require mouse movement before enabling hyperlinks",
                  "auto-hyperlink-mouseover", "ahmo", 0, 0);
  @ <br>
  entry_attribute("Delay before enabling hyperlinks (milliseconds)", 5,
                  "auto-hyperlink-delay", "ah-delay", "10", 0);