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

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

Block layer patches

# gpg: Signature made Mon 24 Oct 2016 17:02:47 BST
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (23 commits)
  block/replication: Clarify 'top-id' parameter usage
  block: More operations for meta dirty bitmap
  tests: Add test code for hbitmap serialization
  block: BdrvDirtyBitmap serialization interface
  hbitmap: serialization
  block: Assert that bdrv_release_dirty_bitmap succeeded
  block: Add two dirty bitmap getters
  block: Support meta dirty bitmap
  tests: Add test code for meta bitmap
  HBitmap: Introduce "meta" bitmap to track bit changes
  block: Hide HBitmap in block dirty bitmap interface
  quorum: do not allocate multiple iovecs for FIFO strategy
  quorum: change child_iter to children_read
  iotests: Do not rely on unavailable domains in 162
  iotests: Remove raciness from 162
  qemu-nbd: Add --fork option
  qemu-iotests: Test I/O in a single drive from a throttling group
  throttle: Correct access to wrong BlockBackendPublic structures
  qapi: fix memory leak in bdrv_image_info_specific_dump
  block: improve error handling in raw_open
  ...

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