Quick clarification "allowed spam host domains" and subdomains/hosts?

Continuing the discussion from Bug? White listed spam host domains failing:

The above topic is old, but the question at the end never got an answer — and perhaps things have changed since then.

Can someone confirm that listing a domain in the allowed spam host domains setting also allows all subdomains and hosts under that name? That is, listing kernel.org also allows bugzilla.kernel.org and www.kernel.org?