RE: dev-tsdh-* themes

[Drew Adams]

> could also be solved by having an etc/themes/contrib/ subdirectory,
> which is what most packages do these days for files contributed by
                                 ^^^^^^^^^^
> people other than the immediate maintainers.

So did Emacs itself have a `contrib' subdir, decades ago, for Lisp files
distributed but not maintained by Officialdom.  I don't recall whether that was
GNU Emacs, XEmacs, Epoch,... or some subset of these.