[libvirt] PATCH: Support SDL configuration for QEMU driver

[Cole Robinson]

Daniel P. Berrange wrote:
> QEMU has two modes of providing a graphical display, VNC and SDL. Now most
> of our tools just use VNC, but occasionally people want to use SDL for 
> some crazy reason. We already support this in Xen driver, but the QEMU
> impl has been rather lacking. At the moment if you ask for a SDL display
> it'll only happen to work if you had the $DISPLAY environment variable
> set when you started libvirtd - you probably don't.
> 

I've thought about this issue before, not sure how to fully solve it
though. If we set the display in the xml at install time (say setting
it to :0.0), but at a later time we ssh =Y into that machine, the 
display in the xml will be wrong, and possibly pop the sdl window on
someone else's display. Possibly a solution at the virsh or 
virt-manager level?

Thanks,
Cole