Merge remote-tracking branch 'qmp/queue/qmp' into staging

* qmp/queue/qmp:
  build: install qmp-commands.txt
  Add rate limiting of RTC_CHANGE, BALLOON_CHANGE & WATCHDOG events
  Add event notification for guest balloon changes
  Fix some more license versions (GPL2+ instead of GPL2)
  monitor: Fix memory leak with readline completion
  qmp: do not include monitor.h from qapi-types-core.h
  qmp: include monitor.h when needed
  kvm: add missing include files