Merge remote-tracking branch 'remotes/berrange/tags/pull-qio-2017-10-16-1' into staging

Merge remote-tracking branch 'remotes/berrange/tags/pull-qio-2017-10-16-1' into staging

Merge QIO 2017/10/16 v1

# gpg: Signature made Mon 16 Oct 2017 17:10:54 BST
# gpg:                using RSA key 0xBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>"
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>"
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/pull-qio-2017-10-16-1:
  io: fix mem leak in websock error path
  io: add trace points for websocket HTTP protocol headers
  io: cope with websock 'Connection' header having multiple values
  io: get rid of bounce buffering in websock write path
  io: pass a struct iovec into qio_channel_websock_encode
  io: get rid of qio_channel_websock_encode helper method
  io: simplify websocket ping reply handling
  io: monitor encoutput buffer size from websocket GSource
  sockets: Handle race condition between binds to the same port
  sockets: factor out create_fast_reuse_socket
  sockets: factor out a new try_bind() function

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>