anchor.diff:                                                 {config_path, cfg_path}]},
                     {set, {node, _, memcached_config}, memcached_config},
                     {set, {node, _, port_servers}, port_servers_cfg}],
  -                 do_upgrade_config_from_3_0_to_3_0_1(Cfg, Default)).
  +                 do_upgrade_config_from_3_0_1_to_3_0_99(Cfg, Default)).
   
   
   no_upgrade_on_current_version_test() ->
  
positive.code:     do_upgrade_config_from_3_0_to_3_0_1(Config, DefaultConfig).
  
  do_upgrade_config_from_3_0_to_3_0_1(Config, DefaultConfig) ->
      McdKey = {node, node(), memcached},
      JTKey = {node, node(), memcached_config},
      PortServersKey = {node, node(), port_servers},
  
negative.code:              upgrade_config_from_2_3_0_to_3_0(Config)];
          {value, {3,0}} ->
              [{set, {node, node(), config_version}, {3,0,1}} |
               upgrade_config_from_3_0_to_3_0_1(Config)];
          {value, {3,0,1}} ->
              [{set, {node, node(), config_version}, {3,0,99}} |
               upgrade_config_from_3_0_1_to_3_0_99(Config)]
      end.
  
  upgrade_config_from_1_7_to_1_7_1() ->
  