[PATCH v4] VNC-related HMP/QMP fixes

[Stefan Reiter <s.reiter@proxmox.com>]

Since the removal of the generic 'qmp_change' command, one can no longer replace
the 'default' VNC display listen address at runtime (AFAIK). For our users who
need to set up a secondary VNC access port, this means configuring a second VNC
display (in addition to our standard one for web-access), but it turns out one
cannot set a password on this second display at the moment, as the
'set_password' call only operates on the 'default' display.

Additionally, using secret objects, the password is only read once at startup.
This could be considered a bug too, but is not touched in this series and left
for a later date.


v3 -> v4:
* drop previously patch 1, this was fixed here instead:
  https://lists.gnu.org/archive/html/qemu-devel/2021-09/msg02529.html
* patch 1: add Eric's R-b
* patch 2: remove if-assignment, use 'deprecated' feature in schema

v2 -> v3:
* refactor QMP schema for set/expire_password as suggested by Eric Blake and
  Markus Armbruster

v1 -> v2:
* add Marc-André's R-b on patch 1
* use '-d' flag as suggested by Eric Blake and Gerd Hoffmann
  * I didn't see a way to do this yet, so I added a "flags with values" arg type


Stefan Reiter (2):
  monitor/hmp: add support for flag argument with value
  monitor: refactor set/expire_password and allow VNC display id

 hmp-commands.hx    |  24 ++++---
 monitor/hmp-cmds.c |  57 ++++++++++++++-
 monitor/hmp.c      |  17 ++++-
 monitor/qmp-cmds.c |  62 ++++++----------
 qapi/ui.json       | 173 +++++++++++++++++++++++++++++++++++++--------
 5 files changed, 251 insertions(+), 82 deletions(-)

-- 
2.30.2