HTTP: added more variables.

This commit adds the following variables:
$remote_addr, $time_local, $request_line, $status,
$body_bytes_sent, $header_referer, $header_user_agent.

docs/changes.xml

@@ -43,6 +43,12 @@ ability to get dynamic variables.
 </para>
 </change>
 
+<change type="feature">
+<para>
+more http variables support.
+</para>
+</change>
+
 <change type="bugfix">
 <para>
 an index file that didn't contain a file extension was incorrectly