Preliminary patch for allowing relative includes

Hi guys, Attached is a patch which I worked up quickly (could probably use some improving) which should solve the problem with includes of relative includes :) Simpler said: a.php ----- <?php include "../b.php"; ?> b.php ----- <?php include "c.php"; ?> c.php ----- <?php print "Yay!" ?> This example should work when c.php is in the same directory as b.php and PHP is ran on a.php. Please check this patch. It might crash in certain cases, I barely tested it. Let me know... Andi