- unfortunately this changes our INDEX format
  - on Ubuntu <16.04 hashdeep seems to be not available
  - on Ubuntu >14.04 sha1deep seems to be not available
  - for a long term archival program this situation is problematic, we
    have to make sure the indexer/hasher is available for 10 years,
    can't rely on linux distros here.
  - metadata test is turned off for now until I find a good solution for
    the hashdeep/sha1deep problem