Merge remote-tracking branch 'remotes/armbru/tags/pull-misc-2018-07-16' into staging

Miscellaneous patches for 2018-07-16 (3.0.0-rc1)

# gpg: Signature made Mon 16 Jul 2018 14:50:07 BST
# gpg:                using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-misc-2018-07-16:
  monitor: Fix tracepoint crash on JSON syntax error
  MAINTAINERS: New section "Incompatible changes", copy libvir-list
  qemu-doc: Move appendix "Deprecated features" to its own file
  cli qmp: Mark --preconfig, exit-preconfig experimental
  qapi: Do not expose "allow-preconfig" in query-qmp-schema

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