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 and object-add QAPIfication

- QAPIfy object-add and --object
- stream: Fail gracefully if permission is denied
- storage-daemon: Fix crash on quit when job is still running
- curl: Fix use after free
- char: Deprecate backend aliases, fix QMP query-chardev-backends
- Fix image creation option defaults that exist in both the format and
  the protocol layer (e.g. 'cluster_size' in qcow2 and rbd; the qcow2
  default was incorrectly applied to the rbd layer)

# gpg: Signature made Fri 19 Mar 2021 09:18:22 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: (42 commits)
  vl: allow passing JSON to -object
  qom: move user_creatable_add_opts logic to vl.c and QAPIfy it
  tests: convert check-qom-proplist to keyval
  qom: Support JSON in HMP object_add and tools --object
  char: Simplify chardev_name_foreach()
  char: Deprecate backend aliases 'tty' and 'parport'
  char: Skip CLI aliases in query-chardev-backends
  qom: Add user_creatable_parse_str()
  hmp: QAPIfy object_add
  qemu-img: Use user_creatable_process_cmdline() for --object
  qom: Add user_creatable_add_from_str()
  qemu-nbd: Use user_creatable_process_cmdline() for --object
  qemu-io: Use user_creatable_process_cmdline() for --object
  qom: Factor out user_creatable_process_cmdline()
  qom: Remove user_creatable_add_dict()
  qemu-storage-daemon: Implement --object with qmp_object_add()
  qom: Make "object" QemuOptsList optional
  qapi/qom: QAPIfy object-add
  qapi/qom: Add ObjectOptions for x-remote-object
  qapi/qom: Add ObjectOptions for input-*
  ...

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