WIP: Feature/kvm external disk reimplement
It's needed to redo part of https://lab.nexedi.com/nexedi/slapos/merge_requests/1143 in libc smart way, so that for libc < 2.25 the KVM SR is able to build and instantiate without the ceph/librdb feature.
It's needed to redo part of https://lab.nexedi.com/nexedi/slapos/merge_requests/1143 in libc smart way, so that for libc < 2.25 the KVM SR is able to build and instantiate without the ceph/librdb feature.