backrest auto tagging

[kinghat]

is backrest auto tagging the snap shot with the plans name: plan:plan-name for internal backrest purposes or as a courtesy? if its the latter it might be better to just have an already filled in backup flag --tag plan:plan-name when the user is creating a new plan.

[garethgeorge]

These are used by backrest to properly re-import your backups on a new system such that they will still be associated with the plan that created them (e.g. if you backup your config somewhere and restore it onto a new host).

Backrest will import snapshots without a plan tag as "unassociated".