[racket] Faking a language for documentation linking in Scribble

I think it should be possible.  The Inside Racket docs have hyperlinks
to the C functions, so there must be a mechanism for talking about
"foreign" bindings.  How does it do it?

Reading...

... It looks like the Inside Racket documentation has a set of
scribble functions for C code:

    http://git.racket-lang.org/plt/blob_plain/HEAD:/collects/scribblings/inside/utils.rkt

Perhaps you can adapt this code?