Merge remote branch 'upstream/stable-0.14' into stable-0.14

Merge remote branch 'upstream/stable-0.14' into stable-0.14

* upstream/stable-0.14:
  qemu-char: Check for missing backend name
  Update version for 0.14.0
  Update version for 0.14.0-rc2
  Fix build from previous commit
  PATCH] slirp: fix buffer overrun
  correctly check ppr priority during interrupt injection]
  qcow2: Fix order in L2 table COW
  qemu-img: Improve error messages for failed bdrv_open
  qed: Report error for unsupported features
  qcow2: Report error for version > 2
  qerror: Add QERR_UNKNOWN_BLOCK_FORMAT_FEATURE
  qcow2: Fix error handling for reading compressed clusters
  qcow2: Fix error handling for immediate backing file read failure
  QCOW2: bug fix - read base image beyond its size
  Change snapshot_blkdev hmp to use correct argument type for device
  linux-user: Fix possible realloc memory leak
  linux-user: Fix possible realloc memory leak
  linux-user: fix for loopmount ioctl
  blockdev: Plug memory leak in drive_init() error paths
  blockdev: Plug memory leak in drive_uninit()

Signed-off-by: Avi Kivity <avi@redhat.com>