Trac Ticket 168 - minssf should not apply to rootdse
    
    https://fedorahosted.org/389/ticket/168
    
    Fix description: This patch is for supporting a request to
    allow accessing rootdse with lower ssf than minssf configuration
    setting.
    . introduced a on/off type config parameter:
          nsslapd-minssf-exclude-rootdse.
    . by default, the value is off.
    . when it is off, the server's behavior remains intact.
    . when it is on, the server allows to access rootdse even if
      the ssf value is less than nsslapd-minssf value.