Refactored myrequests page to use a $user var instead of $_SERVER['REMOTE_USER'] - this sets us up to look in other evn var for the user.
Set the $user to one of REMOTE_USER, REDIRECT_REMOTE_USER, or PHP_AUTH_USER, in that order.
Refactors server REMOTE_USER to user for testing against multiple server user vaiables
Sets  to one of three server env variables based on which are available