Signed-off-by: Christoph Anton Mitterer <mail@christoph.anton.mitterer.name>

Where applicable the following Shell Command Language sanitations were made:
• Resolved invocations of `test` respectively `[` whose results are unspecified
  (for example such with > 4 arguments).

Signed-off-by: Christoph Anton Mitterer <mail@christoph.anton.mitterer.name>

• Imported cron jobs for updating the X.509 proxy certificate and the package
  repository data within the container.

Signed-off-by: Christoph Anton Mitterer <mail@christoph.anton.mitterer.name>