[New openssl version] OpenSSL 4.0.0

[github-actions]

https://github.com/openssl/openssl/releases/tag/openssl-4.0.0

[dscho]

Hmm. I think we should rethink our openssl/mingw-w64-openssl strategy. For x86_64/aarch64, we could simply switch to MSYS2's packages. For i686, we could keep building our own versions and stay on the v3.5.* train, which is supposedly good until 2029: