unbound: Vendor import 1.24.0
Release notes at
https://nlnetlabs.nl/news/2025/Sep/18/unbound-1.24.0-released/
MFC after: 1 week
Merge commit '0064eb9cf1c8d526e87d3149249445d4bc8d0248'
(cherry picked from commit b2efd602aea8b3cbc3fb215b9611946d04fceb10)