bozohttpd: minor formatting
bozohttpd: minor formatting

The Nix style guide isn't exactly comprehensive, but this at least seems
slightly closer to the examples:

https://nixos.org/manual/nixpkgs/stable/#sec-syntax

I'm annoyed that nixpkgs-fmt as of writing won't accept:

  COPTS = [
    # ...
  ] ++ optional (...) "..."
    ++ optional (...) "...";

...which seems to be the actual convention, looking at eg. pkgs.nginx.

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