bupstash new-sub-key [OPTIONS]

Create a new sub-key capable of a limited set of
operations the original key can.

Examples:
  $ bupstash new-key -o ./backups.key
  $ bupstash new-sub-key --put -k ./backups.key -o ./put.key
  $ bupstash new-sub-key --list -k ./backups.key -o ./list.key
  $ bupstash new-sub-key --list-contents -k ./backups.key -o ./list.key
