Can we support `thr:in-reply-to` tags?

[ackerleytng]

I'm trying to use elfeed to read the atom feeds of a kernel patch series, as in https://lore.kernel.org/all/[email protected]/t.atom.

It would be nice to have the entries sorted in a tree view.

The data is available in the feed as Atom's threading extensions (https://datatracker.ietf.org/doc/rfc4685/).

Are you open to parsing this thr:in-reply-to tag?