Merge remote-tracking branch 'remotes/kraxel/tags/pull-vnc-20150122-1' into staging

Merge remote-tracking branch 'remotes/kraxel/tags/pull-vnc-20150122-1' into staging

vnc: add support for multiple vnc displays

# gpg: Signature made Thu 22 Jan 2015 11:00:54 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-vnc-20150122-1:
  monitor: add vnc websockets
  monitor: add query-vnc-servers command
  vnc: factor out qmp_query_client_list
  vnc: track & limit connections
  vnc: update docs/multiseat.txt
  vnc: allow binding servers to qemu consoles
  vnc: switch to QemuOpts, allow multiple servers
  vnc: add display id to acl names
  vnc: remove unused DisplayState parameter, add id instead.
  vnc: remove vnc_display global

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