[PVE-User] VM.snapshot for PVEVMUser role

[Dietmar Maurer]

> Backups can also eat up storage.. can we also set a value (like for the
> backups) saying "Maximum 5 snapshots at the same time allowed"?

That would make sense, yes.
 
> Another thing i wanted to ask is, if you plan to integrate some kind of
> backup lifecycling ("rotate"), that if backups are older than X days and
> a new backup exists, delete the old?

This is already implemented.