Hello Sebastian! I have now MariaDB 10.6 working with OpenSSL 3.0.0. Yihuu!
However I have problems making the correct debian/control changes. If I use just 'libssl-dev' as the dependency then the build will pick up old OpenSSL 1.1.1. If I use 'libssl-dev (>= 3.0.0)' then only experimental builds work and the unstable builds fail. I can't upload that to Debian unstable. What is wrong in my debian/control usage? See commits on branch https://salsa.debian.org/mariadb-team/mariadb-server/-/commits/dev-otto and CI results on https://salsa.debian.org/mariadb-team/mariadb-server/-/pipelines