Ticket 48310 - entry distribution should be case insensitive
    
    Bug Description:  Entry distribution functions were not case
    insensitive, but they should have been.
    
    Fix Description:  Make the distribution case insensitive.
    
    https://pagure.io/389-ds-base/issue/48310
    
    Author: jmoral (Thanks!)
    
    Review by: wibrown, mreynolds