Merge remote-tracking branch 'jtc/tags/block-pull-request' into staging

# gpg: Signature made Tue 15 Nov 2016 04:10:29 AM GMT
# gpg:                using RSA key 0xBDBE7B27C0DE3057
# gpg: Good signature from "Jeffrey Cody <jcody@redhat.com>"
# gpg:                 aka "Jeffrey Cody <jeff@codyprime.org>"
# gpg:                 aka "Jeffrey Cody <codyprime@gmail.com>"
# Primary key fingerprint: 9957 4B4D 3474 90E7 9D98  D624 BDBE 7B27 C0DE 3057

* jtc/tags/block-pull-request:
  mirror: do not flush every time the disks are synced
  block/curl: Do not wait for data beyond EOF
  block/curl: Remember all sockets
  block/curl: Fix return value from curl_read_cb
  block/curl: Use BDRV_SECTOR_SIZE
  block/curl: Drop TFTP "support"
  qemu-iotests: avoid spurious failure on test 109
  iotests: add transactional failure race test
  blockjob: refactor backup_start as backup_job_create
  blockjob: add block_job_start
  blockjob: add .start field
  blockjob: add .clean property
  blockjob: fix dead pointer in txn list

Message-id: 1479183291-14086-1-git-send-email-jcody@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>