to make it easier to comlain about `strtok` :-) Inspired by https://github.com/systemd/systemd/pull/11963, which, in turn, was prompted by https://github.com/systemd/systemd/pull/11555.
As everybody knows, nodoby really reads CODING_STYLE (especially the last paragraph :-)) so let's utilize LGTM to help us catch the use of fgets.