Merge remote-tracking branch 'stefanha/net' into staging

# By Dmitry Fleytman (1) and others
# Via Stefan Hajnoczi
* stefanha/net:
  virtio-net: broken RX filtering logic fixed
  net: fix qemu_flush_queued_packets() in presence of a hub
  net: disallow to specify multicast MAC address

Message-id: 1383928804-28866-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>