Ticket 47487 - enhance retro changelog
    
    Bug Description:  applications using retro cl might need the
    			full information on deleted entries
    			eg to verify if the entry matches filter or access
    
    Fix Description:  introduce a new attribute in the retro changelog
    			config entry: nsslapd-log-deleted (off by default)
    
    https://fedorahosted.org/389/ticket/47487
    
    Reviewed by: MarkR