Central place for putting package-related info. This document or parts
of it can also be easily ported to other places if deemed appropriate.
This is a backport of [[https://github.com/bitcoin/bitcoin/pull/22674 | core#22674]]
https://github.com/bitcoin/bitcoin/pull/22674/commits/d59ddc5c3d1c035474d7bc9fa9f8a0eeb1c8498c