anchor.diff:  
           {verbosity, verbosity},
           {audit_file, {"~s", [audit_file]}},
  +        {rbac_file, {"~s", [rbac_file]}},
           {dedupe_nmvb_maps, dedupe_nmvb_maps}
          ]}},
   
  
positive.code:            {static_config_string, "vb0=true"}]}]},
         {config_path, path_config:default_memcached_config_path()},
         {audit_file, ns_audit_cfg:default_audit_json_path()},
         {log_path, LogDir},
         %% Prefix of the log files within the log path that should be rotated.
         {log_prefix, "memcached.log"},
  
negative.code:             [{set, {node, node(), config_version}, {4,1,1}} |
               upgrade_config_from_4_0_to_4_1_1(Config)];
          {value, {4,1,1}} ->
              [{set, {node, node(), config_version}, {4,5}} |
               upgrade_config_from_4_1_1_to_4_5()];
          {value, {4,5}} ->
              [{set, {node, node(), config_version}, CurrentVersion} |
               upgrade_config_from_4_5_to_Spock(Config)];
          V0 ->
              OldVersion =
                  case V0 of
  