Ticket #49946 upgrade of 389-ds-base could remove replication agreements.
    
    Bug Description:
    
    when a replication agreement starts with "cn=->...", the upgrade is removing
    the entry.
    
    Fix Description:
    
    a check is missing when re-building dse.ldif in "setup-ds.pl -u" that provoked this entry not to be re-added to the file.
    
    https://pagure.io/389-ds-base/issue/49946
    
    Author: German Parente <gparente@redhat.com>
    
    Review by: ???