From 7297b23508391a8d03e7801ce6bf46db9bef4e90 Mon Sep 17 00:00:00 2001
From: Holger Weiss <holger@zedat.fu-berlin.de>
Date: Tue, 5 May 2015 22:00:05 +0200
Subject: [PATCH] Tag private MUC messages with muc#user namespace

Make it possible for clients to identify private MUC messages.  One use
case would be to filter out undesired carbon copies of those.
---
 src/mod_muc_room.erl | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mod_muc_room.erl b/src/mod_muc_room.erl
index f381e8458..8d0b36b6c 100644
--- a/src/mod_muc_room.erl
+++ b/src/mod_muc_room.erl
@@ -570,7 +570,10 @@ normal_state({route, From, ToNick,
 				   FromNickJID =
 				       jlib:jid_replace_resource(StateData#state.jid,
 								 FromNick),
-				   [ejabberd_router:route(FromNickJID, ToJID, Packet)
+				   X = #xmlel{name = <<"x">>,
+					      attrs = [{<<"xmlns">>, ?NS_MUC_USER}]},
+				   PrivMsg = xml:append_subtags(Packet, [X]),
+				   [ejabberd_router:route(FromNickJID, ToJID, PrivMsg)
 				    || ToJID <- ToJIDs];
 			       true ->
 				   ErrText =