Implement whitelist to eliminate 403 Forbidden errors in IE8

Created a whitelist of all known 403 Forbidden errors occurring in IE8 that are caused by IE8 not passing the referer on redirects. 

https://bugzilla.redhat.com/show_bug.cgi?id=1125380
https://bugzilla.redhat.com/show_bug.cgi?id=1123494
https://bugzilla.redhat.com/show_bug.cgi?id=1087539
If you align these let statements on the `{` character, then these become a little clearer to see.  Also :+1: on the potatoes :fries: