Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Mon 14 Mar 2016 16:36:52 GMT using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream: (40 commits)
  iotests: Add test for QMP event rates
  monitor: Use QEMU_CLOCK_VIRTUAL for the event queue in qtest mode
  monitor: Separate QUORUM_REPORT_BAD events according to the node name
  quorum: Fix crash in quorum_aio_cb()
  iotests: Correct 081's reference output
  block: Remove unused typedef of BlockDriverDirtyHandler
  block: Move block dirty bitmap code to separate files
  typedefs: Add BdrvDirtyBitmap
  block: Include hbitmap.h in block.h
  backup: Use Bitmap to replace "s->bitmap"
  vpc: Use BB functions in .bdrv_create()
  vmdk: Use BB functions in .bdrv_create()
  vhdx: Use BB functions in .bdrv_create()
  vdi: Use BB functions in .bdrv_create()
  sheepdog: Use BB functions in .bdrv_create()
  qed: Use BB functions in .bdrv_create()
  qcow2: Use BB functions in .bdrv_create()
  qcow: Use BB functions in .bdrv_create()
  parallels: Use BB functions in .bdrv_create()
  block: Introduce blk_set_allow_write_beyond_eof()
  ...

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