cascade delete the backup with --cascade option

Registered by int32bit on 2017-02-10

Currently don't allow backup to be deleted if there are incremental backups dependent on it. But some users may want to delete one backup chain with one key. We should add cascade optional argument to the API, if this flag is present, both the backup and their all children backups will be deleted compltely.

Blueprint information

Status:
Not started
Approver:
Sean McGinnis
Priority:
Low
Drafter:
int32bit
Direction:
Approved
Assignee:
None
Definition:
Approved
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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