- Ignore SC1091: Not following: /etc/grml/script-functions was not specified as input (see shellcheck -x).
- Ignore SC1091: Not following: /etc/grml/lsb-functions was not specified as input (see shellcheck -x).
- SC2162: read without -r will mangle backslashes.
- SC2166: Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.