$HTTP_USER_AGENT reports an unexpected value when inlcuded via a URL-reference:

e.g. 

test1.php
--
<?php echo $HTTP_USER_AGENT; ?>
--

test2.php
--
<?php include "http://servername.com/test1.php"; ?>
--

http://servername.com/test1.php displays (example):
  Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0)

http://servername.com/test2.php displays:
  PHP/4.0.4pl1

I can understand why this happens: when including a URL-referenced file, PHP obviously acts as the HOST that makes the request. However, is there a workaround for this?

- Bobby.