Merge remote-tracking branch 'remotes/kraxel/tags/ui-20180515-pull-request' into...

ui: qapi parser for -display cmd line.
gtk: multiple fixes.
sdl: opts bugfix.
vnc: magic cookie.

# gpg: Signature made Tue 15 May 2018 10:18:51 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# 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>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/ui-20180515-pull-request:
  gtk: disable the F10 menubar key
  console: use linked list for QemuConsoles
  ui: document non-qapi parser cases.
  ui: switch gtk display to qapi parser
  ui: switch trivial displays to qapi parser
  ui: add qapi parser for -display
  vnc: add magic cookie to VncState
  ui/gtk: Only try to initialize EGL/X11 if GtkGlArea failed
  gtk: make it possible to hide the menu bar
  sdl2: move opts assignment into loop

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