Fix some broken links already fixed in trunk. (incorrect module names in <directive>)

    <example><title>Simple gateway</title>

    <highlight language="config">

      ProxyPass /scgi-bin/ scgi://localhost:4000/

ProxyPass "/scgi-bin/" "scgi://localhost:4000/"

      </highlight>

    </example>

        and <var>Script-URI</var> and be compliant with RFC 3875 section 3.3.

        If instead you need <module>mod_proxy_scgi</module> to generate

        a "best guess" for <var>PATH_INFO</var>, set this env-var.  The

        variable must be set before <directive module="env">SetEnv</directive>

        is effective.  <directive module="setenv">SetEnvIf</directive> can be

        variable must be set before <directive module="mod_env">SetEnv</directive>

        is effective.  <directive module="mod_setenvif">SetEnvIf</directive> can be

        used instead: <code>SetEnvIf Request_URI . proxy-scgi-pathinfo</code>

        </dd>

    </dl>