mod_proxy_html: Add ProxyHTMLURLMap conditions to docs.

</dd>

</dl>

<p>The optional fourth <strong>cond</strong> argument defines a condition

that will be evaluated per Request, provided

<directive>ProxyHTMLInterp</directive> is <var>On</var>.

If the condition evaluates FALSE the map will not be applied in this request.

If TRUE, or if no condition is defined, the map is applied.</p>

<p>A <strong>cond</strong> is evaluated by the <a href="../expr.html"

>Expression Parser</a>.  In addition, the simpler syntax of conditions

in mod_proxy_html 3.x for HTTPD 2.0 and 2.2 is also supported.</p>

</usage>

</directivesynopsis>