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When enabling hw_qemu_guest_agent on an image and booting it up, qemu 
creates a unix socket in /var/lib/libvirt/qemu.  However, it looks like 
it never gets cleaned up when the instance is deleted.

Ideally it seems like something that qemu or libvirt should handle, but 
would it maybe make sense to have some code in nova to clean it up just 
in case qemu/libvirt don't do it properly?

Chris