anchor.diff:  
   update_stanchion_config(Prefix, Config, {_,_} = AdminCreds) ->
       update_stanchion_config(Prefix, Config, fun(_,Config0,_) -> Config0 end, AdminCreds);
  -update_stanchion_config(Prefix, Config, ConfigFun) when is_function(ConfigFun) ->
  -    update_stanchion_config1(Prefix, Config, ConfigFun).
  -
  -update_stanchion_config(Prefix, Config, ConfigFun, {AdminKey, AdminSecret}) ->
  +update_stanchion_config(Prefix, Config, ConfigUpdateFun) when is_function(ConfigUpdateFun) ->
  +    update_stanchion_config1(Prefix, Config, ConfigUpdateFun).
  +
  +update_stanchion_config(Prefix, Config, ConfigUpdateFun, {AdminKey, AdminSecret}) ->
       StanchionSection = proplists:get_value(stanchion, Config),
       UpdConfig = [{stanchion, update_admin_creds(StanchionSection, AdminKey, AdminSecret)} |
                    proplists:delete(stanchion, Config)],
  -    update_stanchion_config1(Prefix, UpdConfig, ConfigFun).
  -
  -update_stanchion_config1(Prefix, Config0, ConfigFun) when is_function(ConfigFun) ->
  -    Config = ConfigFun(stanchion, Config0, undefined),
  +    update_stanchion_config1(Prefix, UpdConfig, ConfigUpdateFun).
  +
  +update_stanchion_config1(Prefix, Config0, ConfigUpdateFun) when is_function(ConfigUpdateFun) ->
  +    Config = ConfigUpdateFun(stanchion, Config0, undefined),
       update_app_config(stanchion_etcpath(Prefix), Config).
   
   update_app_config(Path, Config) ->
  
positive.code: riak_binpath(Prefix, N) ->
      io_lib:format("~s/dev/dev~b/bin/riak", [Prefix, N]).
  
  riak_repl_binpath(Prefix, N) ->
      io_lib:format("~s/dev/dev~b/bin/riak-repl", [Prefix, N]).
  
  riakcmd(Path, N, Cmd) ->
      lists:flatten(io_lib:format("~s ~s", [riak_binpath(Path, N), Cmd])).
  
  riak_repl_cmd(Path, N, Cmd) ->
      lists:flatten(io_lib:format("~s ~s", [riak_repl_binpath(Path, N), Cmd])).
  
  riakcs_home(Prefix, N) ->
      io_lib:format("~s/dev/dev~b/", [Prefix, N]).
  
negative.code:     os:cmd(Cmd).
  
  enable_proxy_get(SrcN, Vsn, SinkCluster) ->
      rtdev:run_riak_repl(SrcN, get_rt_config(riak, Vsn),
                          "proxy_get enable " ++ SinkCluster).
  
  disable_proxy_get(SrcN, Vsn, SinkCluster) ->
      rtdev:run_riak_repl(SrcN, get_rt_config(riak, Vsn),
                          "proxy_get disable " ++ SinkCluster).
  
  read_config(Vsn, N, Who) ->
      Prefix = get_rt_config(Who, Vsn),
  