note 26479 added to function.unlink

thanks to Ville Tuomola, a student at Abo Akademi University, Finland, I take back what I have said in a note before, it seems we can delete any file in a writable directory regardless of permissions, can't delete any file in a write-protected directory regardless file permissions. functioning just like system command 'rm'. -- http://www.php.net/manual/en/function.unlink.php http://master.php.net/manage/user-notes.php?action=edit+26479 http://master.php.net/manage/user-notes.php?action=delete+26479 http://master.php.net/manage/user-notes.php?action=reject+26479