[pbs-devel] [RFC proxmox-backup] fix #5710: api: backup: stat known chunks during backup

[Dietmar Maurer]

> Known chunks are expected to be present on the datastore a-priori,
> allowing clients to only re-index these chunks without uploading the
> raw chunk data. The list of reusable known chunks is send to the
> client by the server, deduced from the indexed chunks of the previous
> backup snapshot of the group.

Is it possible to only stat actually reused chunks at the end?