qemu: Allow serving VNC over a unix domain socket
QEMU supports serving VNC over a unix domain socket rather than traditional TCP host/port. This is specified with: <graphics type='vnc' socket='/foo/bar/baz'/> This provides better security access control than VNC listening on 127.0.0.1, but will cause issues with tools that rely on the lax security (virt-manager in fedora runs as regular user by default, and wouldn't be able to access a socket owned by 'qemu' or 'root'). Also not currently supported by any clients, though I have patches for virt-manager, and virt-viewer should be simple to update. v2: schema: Make listen vs. socket a <choice>
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