@ A captcha test is is rendered instead.
  @ The default value for this setting is:
  @ <p>
  @ &emsp;&emsp;&emsp;<tt>%h(robot_restrict_default())</tt>
  @ <p>
  @ The "diff" tag covers all diffing pages such as /vdiff, /fdiff, and 
  @ /vpatch.  The "annotate" tag covers /annotate and also /blame and
  @ /praise.  The "zip" covers itself and also /tarball and /sqlar. The
  @ /praise.  The "zip" covers itself and also /tarball and /sqlar.
  @ "ziplink" page means any page that contains hyperlinks to a "zip" page.
  @ If a tag has an "X" character appended (ex: "timelineX") then it only
  @ applies if query parameters are such that the page is expensive
  @ and/or unusual. In all other case, the tag should exactly match
  @ the page name.
  @
  @ To disable robot restrictions, change this setting to "off".
  @ (Property: robot-restrict)

  @
  @ <p>The default value is blank, meaning no added entries.
  @ (Property: sitemap-extra)
  @ <p>
  textarea_attribute("Custom Sitemap Entries", 8, 80,
      "sitemap-extra", "smextra", "", 0);
  @ <hr>
  @ <p>Configuration for the <a href="%R/tarlist">/tarlist</a> page.
  @ <p>Configuration for the <a href="%R/download">/download</a> page.
  @ The value is a TCL list divided into pairs.
  @ <ol>
  @ <li> The first term of each pair is an integer (N).
  @ <li> The second term of each pair is a glob pattern (PATTERN).
  @ </ol>
  @ For each pair, the most recent N check-ins that have a tag that
  @ matches PATTERN are included in on the /tarlist page.  The special
  @ matches PATTERN are included in on the /download page.  The special
  @ pattern of "OPEN-LEAF" matches all open leaf check-ins.  Example:
  @ <blockquote><tt>1 trunk 3 release 5 OPEN-LEAF</tt></blockquote>
  @ The example pattern above shows the union of the most recent trunk
  @ check-in, the 5 most recent open leaf check-ins, and the 3 most
  @ recent check-ins tagged with "release".  
  @ <p>
  @ The /tarlist page is omitted from the <a href="%R/sitemap">/sitemap</a>
  @ The /download page is omitted from the <a href="%R/sitemap">/sitemap</a>
  @ if the first token is "0" or "off" or "no".  The default value is "off".
  @ (Property: suggested-tarlist)
  @ (Property: <a href="%R/help/suggested-downloads">suggested-downloads</a>)
  @ <p>
  textarea_attribute("Check-ins To Show On /tarlist", 2, 80,
      "suggested-tarlist", "sgtrlst", "off", 0);
  textarea_attribute("Suggested Downloads", 2, 80,
      "suggested-downloads", "sgtrlst", "off", 0);
  @ <hr>
  @ <p><input type="submit"  name="submit" value="Apply Changes"></p>
  @ </div></form>
  db_end_transaction(0);
  style_finish_page();
}