When the Password attribute is missing in PIEFXIS file, don't check account auth.

src/ejabberd_piefxis.erl

@@ -162,33 +162,39 @@ add_user(El, Domain) ->
     Password = exmpp_xml:get_attribute(El,<<"password">>,none),
     add_user(El, Domain, User, Password).
 
-%% @spec (El::xmlel(), Domain::string(), User::string(), Password::string())
+%% @spec (El::xmlel(), Domain::string(), User::binary(), Password::binary() | none)
 %%       -> ok | {error, ErrorText::string()}
 %% @doc Add a new user to the database.
 %% If user already exists, it will be only updated.
+add_user(El, Domain, User, none) ->
+    io:format("Account ~s@~s will not be created, updating it...~n",
+	      [User, Domain]),
+    io:format(""),
+    populate_user_with_elements(El, Domain, User),
+    ok;
 add_user(El, Domain, User, Password) ->
     case create_user(User,Password,Domain) of
 	ok ->
-	    ok = exmpp_xml:foreach(
-		   fun(_,Child) ->
-			   populate_user(User,Domain,Child)
-		   end,
-		   El),
+	    populate_user_with_elements(El, Domain, User),
 	    ok;
 	{atomic, exists} ->
 	    io:format("Account ~s@~s already exists, updating it...~n",
 		      [User, Domain]),
 	    io:format(""),
-	    ok = exmpp_xml:foreach(
-		   fun(_,Child) ->
-			   populate_user(User,Domain,Child)
-		   end,
-		   El);
+	    populate_user_with_elements(El, Domain, User),
+	    ok;
 	{error, Other} ->
 	    ?ERROR_MSG("Error adding user ~s@~s: ~p~n", [User, Domain, Other]),
 	    {error, Other}
     end.
 
+populate_user_with_elements(El, Domain, User) ->
+    exmpp_xml:foreach(
+      fun (_,Child) ->
+	      populate_user(User,Domain,Child)
+      end,
+      El).
+
 %% @spec (User::string(), Password::string(), Domain::string())
 %%       -> ok | {atomic, exists} | {error, not_allowed}
 %% @doc  Create a new user