Djb followed this with email and Djbdns having config scripts that were plain bash. I remember at the time a lot of people got upset - "it can never be portable". But it compiles and runs everywhere it's supported maybe we're OK with not having detection for amigaOS or something.
All the good programmers use plain shell -- DJB, Fabrice Bellard, Xavier Leroy for OCaml, etc. :)
They don't copy and paste stuff they don't understand
(The DJB scripts were almost certainly plain sh and not bash, since I think this machines were BSD. At that time bash wasn't so ubiquitous -- there was more diversity in shells. I did read a bunch of his scripts many years ago.)
