[Libguestfs] [PATCH 0/3] generator: Allow returned strings to be annotated as devices.

If we want to permit more than 255 drives to be added, then we will have to add the disks to the same virtio-scsi target using different unit (LUN) numbers. Unfortunately SCSI LUN enumeration in the Linux is not deterministic (eg. two disks with target=0, lun=[0,1] can be enumerated as /dev/sda or /dev/sdb randomly). Dealing with that will require some very complex device name translation on the way in and out of the appliance. This commit does _not_ do any of that, but it lays the groundwork so we could do that in future if the need arises. Rich.