Attempting to access non-lowercase /cas path when logged in results in Access Denied

The cas_menu_site_status_alter function in the cas.module file redirects logged in users that visit the /cas path to the front page. However, if logged in users visit any variation of that path without all lowercase letters, such as /Cas or /CAS, users are instead giving the "Access Denied" error message.

Since the cas_menu_site_status_alter function compares $path to 'cas', any non-lowercase path will fail the comparison and not redirect the user, who then receives the error due to the user_is_anonymous access callback on the /cas menu item.

My proposed solution is to compare the lowercase version of $path by using the PHP function strtolower.