Description:
------------
Session randomizes, doesnt pickup Session id's from query string or cookie, when using $_SERVER or $_ENV before starting session.

Reproduce code:
---------------
<?php

/* uncomment any line below to reproduce */

	//$test = $_SERVER['REQUEST_URI'];
	//$test = $_SERVER['REMOTE_ADDR'];
	//$test = $_SERVER[''];
	
	session_start();
		
	if (!isset($_SESSION['count'])) {
	   $_SESSION['count'] = 0;
	} else {
	   $_SESSION['count']++;
	}
	echo $_SESSION['count'];
	

	echo " <a href=\"test.php\">Refresh</a>";
	
	echo '<pre>'; 
	print_r(apache_response_headers()); 
	
?>


Expected result:
----------------
Well as there is no output, I assume it to use the session from the query_string, or cookie on the occasions it actually gets set.

Actual result:
--------------
When uncommenting any of the 3 commented lines above:
- it constantly refreshes the session
- 80% of the times applies urlrewrite which indecates cookies not working while it should.

It works on $_ENV i believe too and possibly some other (global) arrays.

Problem is I included classes before starting the session that are saved within the session.

Without uncommenting the code runs perfect. Assigning strings & integers worked fine (havent tested any others), but using such a variable it resets.