245b651789
With Debian Buster it looks like the 'scsi-' method is no longer
reliable. In addition to that, which is also used for non-multipath
systems, add the 'dm-uuid-mpath-' method as fallback. This is also used
by openstack (see os-brick
39b201160b/os_brick/initiator/linuxscsi.py (L400))
Also sort the output of readdir so 'scsi-' is always after
'dm-uuid-mpath-' so the output of pvesm list does not change for systems
that worked before.
Signed-off-by: Mira Limbeck <m.limbeck@proxmox.com>