Add a standalone VNC server binary that connects to a running QEMU
instance via the D-Bus display interface (org.qemu.Display1, via the bus
or directly p2p). This allows serving a VNC display without compiling
VNC support directly into the QEMU system emulator, and enables running
the VNC server as a separate process with independent lifecycle and
privilege domain.
Built only when both VNC and D-Bus display support are enabled.
If we wanted to have qemu -vnc disabled, and qemu-vnc built, we would
need to split CONFIG_VNC. This is left as a future exercise.
Current omissions include some QEMU VNC runtime features (better handled via
restart), legacy options, and Windows support.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
3a453266e3