Backport of PR #1087 to bareos-21

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• Short description and the purpose of this PR is present above this paragraph
• Your name is present in the AUTHORS file (optional)

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Checklist for the reviewer of the PR (will be processed by the Bareos team)

General

• PR name is meaningful
• Purpose of the PR is understood
• Separate commit for this PR in the CHANGELOG.md, PR number referenced is same
• Commit descriptions are understandable and well formatted
• If backport: add original PR number and target branch at top of this file: Backport of PR#000 to bareos-2x

Source code quality

• Source code changes are understandable
• Variable and function names are meaningful
• Code comments are correct (logically and spelling)
• Required documentation changes are present and part of the PR
• bareos-check-sources --since-merge does not report any problems
• git status should not report modifications in the source tree after building and testing

Tests

• Decision taken that a system- or unittest is required (if not, then remove this paragraph)
• The decision towards a systemtest is reasonable compared to a unittest
• Testname matches exactly what is being tested
• Output of the test leads quickly to the origin of the fault