Support LUKS in disk partitions
Right now the
sys.in only searches LUKS devices at the root of the disks.
With this MR it will support both on root of the disks as well as on partitions.
Imagine you have the following partition scheme
/dev/sda1: Unencrypted partition
/dev/sda2: LUKS partition
Now backupninja will correctly detect
/dev/sda2 and will save the LUKS headers