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

# By Alasdair McLeay (1) and Stefan Hajnoczi (1)
# Via Stefan Hajnoczi
* stefanha/net:
  rtl8139: flush queued packets when RxBufPtr is written
  net: support for bridged networking on Mac OS X

Message-id: 1369406295-20411-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>