Let remoteClientStream only do RX if requested.

Right now, the stream stuff assumes that a stream is always
going to be used for transmit.  This is not the case, and in
fact doesn't work with the tunnelled migration stuff.  Add
a flag to remoteClientStream() to allow it to do RX only.
Signed-off-by: NChris Lalancette <clalance@redhat.com>

daemon/stream.c

@@ -259,7 +259,8 @@ void remoteFreeClientStream(struct qemud_client *client,
  * @stream: a stream to add
  */
 int remoteAddClientStream(struct qemud_client *client,
-                          struct qemud_client_stream *stream)
+                          struct qemud_client_stream *stream,
+                          int transmit)
 {
     struct qemud_client_stream *tmp = client->streams;
 
@@ -280,6 +281,7 @@ int remoteAddClientStream(struct qemud_client *client,
     stream->filter.next = client->filters;
     client->filters = &stream->filter;
 
+    if (transmit)
         stream->tx = 1;
 
     remoteStreamUpdateEvents(stream);

daemon/stream.h

@@ -36,7 +36,8 @@ void remoteFreeClientStream(struct qemud_client *client,
                             struct qemud_client_stream *stream);
 
 int remoteAddClientStream(struct qemud_client *client,
-                          struct qemud_client_stream *stream);
+                          struct qemud_client_stream *stream,
+                          int transmit);
 
 struct qemud_client_stream *
 remoteFindClientStream(struct qemud_client *client,