usr_sbin/grml-setservices: Fix a couple of shellcheck warnings

usr_sbin/grml-setservices: Fix a couple of shellcheck warnings

- SC2086: Double quote to prevent globbing and word splitting.
- 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).
- SC2086: Double quote to prevent globbing and word splitting.
- SC2166: Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.
- SC2086: Double quote to prevent globbing and word splitting.