Add new -teardown option with an async=on|off parameter. It is visible
in the output of query-command-line-options QMP command, so it can be
discovered and used by libvirt.

The option -async-teardown is now redundant. We'd normally deprecate it
and remove it after a grace period, but it was introduced only in the
previous version and it had no users, since it was not visible in the
query-command-line-options QMP command. Drop it.


v4->v5
* reword commit message [Markus]
* document the removal of the -async-teardown commandline option in
  docs/about/removed-features.rst [Markus]

v3->v4
* completely remove the useless -async-teardown option, since it was
  not wired up properly and it had no users [thomas]
* QEMU should be always uppercase in text and documentation [thomas]
* if the new -teardown option fails to parse, exit immediately instead
  of returning an error [thomas]

v2->v3
* add a new teardown option with an async parameter [Markus]
* reworded documentation of existing -async-teardown option so that it
  points to the new teardown option

v1->v2
* remove the unneeded .implied_opt_name initializer [Thomas]

Claudio Imbrenda (1):
  util/async-teardown: wire up query-command-line-options

 docs/about/removed-features.rst |  5 +++++
 os-posix.c                      | 15 +++++++++++++--
 qemu-options.hx                 | 33 +++++++++++++++++++--------------
 util/async-teardown.c           | 21 +++++++++++++++++++++
 4 files changed, 58 insertions(+), 16 deletions(-)

-- 
2.39.2