Upcoming changes will use different LIBXL_API_VERSION variants.
Prepare libxl_domain_create_restore, which got a new parameter
"send_back_fd" in Xen 4.7. libvirt does not use this parameter.
No functional change intended.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
