Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-for-peter-2016-01...

Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-for-peter-2016-01-07' into staging

Block patches from 2015-12-23 until 2016-01-07.

# gpg: Signature made Thu 07 Jan 2016 22:46:08 GMT using RSA key ID E838ACAD
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"

* remotes/maxreitz/tags/pull-block-for-peter-2016-01-07: (21 commits)
  iotests: Add test cases for blockdev-mirror
  qmp: Add blockdev-mirror command
  block: Add check on mirror target
  block: Extract blockdev part of qmp_drive_mirror
  block: Rename BLOCK_OP_TYPE_MIRROR to BLOCK_OP_TYPE_MIRROR_SOURCE
  qemu-iotests: s390x: fix test 051
  iotests: 095: Filter _img_info output
  iotests: 095: Use TEST_IMG override instead of "mv"
  iotests: 050: Use TEST_IMG override instead of "mv"
  iotests: 038: Use TEST_IMG override instead of "mv"
  iotests: 037: Use TEST_IMG override instead of "mv"
  iotests: 034: Use TEST_IMG override instead of "mv"
  iotests: 028: Use TEST_IMG override instead of "mv"
  iotests: 024: Use TEST_IMG override instead of "mv"
  iotests: 020: Use TEST_IMG override instead of "mv"
  iotests: 019: Use TEST_IMG override instead of "mv"
  iotests: 018: Use TEST_IMG override instead of "mv"
  block/qapi: Clear err for further error
  block: use drained section in bdrv_close
  qemu-iotests: make check-block.sh work on out-of-tree builds
  ...

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