Ticket 47427 - Overflow in nsslapd-disk-monitoring-threshold
    
        Bug Description:  If you directory try and set the threshold to -2,
                          the server allows it, but it should be rejected.
    
        Fix Description:  Use a signed int when parsing the value.
    
        https://fedorahosted.org/389/ticket/47427
        https://bugzilla.redhat.com/show_bug.cgi?id=984970
    
        Reviewed by: richm(Thanks!)