Quebes help script usability on non-default wyng metadata-dir

[tlaurion]

I never used qubes qubes.xml backup on snapshots because I'm not deploying sung on default meta-dir, so end user do not have to compexify their usage when using wyng for local backups. Unfortunately, your script never supported non default meta-dir.

Any plan on supporting non-default meta-dir? And have wyng-backup and shell script actually deal with those ?

Thanks!