Ticket 632 - 389-ds-base cannot handle Kerberos tickets with PAC
    
        Bug Description:  When FreeIPA is configured with AD trust support, Kerberos
                          tickets may also contain PAC which makes them bigger than
                          usually expected (bigger than 2048 B)
    
        Fix Description:  Make the default 64k(65536), and allow it to be configurable
                          using: nsslapd-sasl-max-buffer-size
    
        https://fedorahosted.org/389/ticket/632
    
        Reviewed by: nkinder(Thanks!)