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

Instead, these files need to go to /etc/systemd/system and have an `[Install]`
section in which they declare their forward/reverse dependencies.

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

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

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>

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

This reverts commit 6c160c8e.