Improved Login/Logout link by fixing the code that didn't use the right "getShibAssertionConsumerServiceURL()" function correctly and add the global variable "$shib_logout" that now can be used for a shibboleth lazy session that uses $shib_WAYFStyle = "CustomLogin" and a not standard URL for $shib_AssertionConsumerServiceURL variable.

$shib_logout and $shib_AssertionConsumerServiceURL are located on LocalSettings.php