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

Block layer patches:

- Add qemu-storage-daemon documentation
- hw/block/nand: Decommission the NAND museum
- vpc: Clean up some buffer abuse
- nfs: fix int overflow in nfs_client_open_qdict
- Several iotests fixes

# gpg: Signature made Fri 18 Dec 2020 12:07:30 GMT
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  block/vpc: Use sizeof() instead of HEADER_SIZE for footer size
  block/vpc: Pass footer buffers as VHDFooter * instead of uint8_t *
  block/vpc: Pad VHDFooter, replace uint8_t[] buffers
  block/vpc: Use sizeof() instead of 1024 for dynamic header size
  block/vpc: Pad VHDDynDiskHeader, replace uint8_t[] buffers
  block/vpc: Make vpc_checksum() take void *
  block/vpc: Don't abuse the footer buffer for dynamic header
  block/vpc: Don't abuse the footer buffer as BAT sector buffer
  block/vpc: Make vpc_open() read the full dynamic header
  iotests:172: use _filter_qom_path
  iotests: make _filter_qom_path more strict
  MAINTAINERS: add Kevin Wolf as storage daemon maintainer
  docs: add qemu-storage-daemon(1) man page
  docs: generate qemu-storage-daemon-qmp-ref(7) man page
  block/nfs: fix int overflow in nfs_client_open_qdict
  hw/block/nand: Decommission the NAND museum
  iotests/210: Fix reference output

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