Code documentation that the PR was for backwards compatility

src/rebar_git_resource.erl

@@ -6,11 +6,14 @@
 
 -export([init/2,
          lock/2,
-         download/3,
          download/4,
          needs_update/2,
          make_vsn/2]).
 
+%% For backward compatibilty
+-export ([ download/3
+         ]).
+
 -include("rebar.hrl").
 
 %% Regex used for parsing scp style remote url
@@ -124,6 +127,7 @@ download(TmpDir, AppInfo, State, _) ->
             {error, Error}
     end.
 
+%% For backward compatibilty
 download(Dir, AppInfo, State) ->
     download_(Dir, AppInfo, State).
 

src/rebar_hg_resource.erl

@@ -6,11 +6,15 @@
 
 -export([init/2,
          lock/2,
-         download/3,
          download/4,
          needs_update/2,
          make_vsn/2]).
 
+
+%% For backward compatibilty
+-export([ download/3
+        ]).
+
 -include("rebar.hrl").
 
 -spec init(atom(), rebar_state:t()) -> {ok, rebar_resource_v2:resource()}.
@@ -73,6 +77,7 @@ download(TmpDir, AppInfo, State, _) ->
             {error, Error}
     end.
 
+%% For backward compatibilty
 download(Dir, AppInfo, State) ->
     download_(Dir, AppInfo, State).