Cherry-picked from: bitcoin/bitcoin 3272e34f
and bitcoin/bitcoin cc25f892
and bitcoin/bitcoin a33381ac
Conflicts resolved:
- removed ci script and guix file changes that we don't have
- removed changes to libxcb
- squashed commits as cc25f892 was a fixup
- rewrote the change to depends/README
Co-authored-by: fanquake <fanquake@gmail.com>
Co-authored-by: W. J. van der Laan <laanwj@protonmail.com>
