MariaDB Compression pluging pacakages mariadb-plugin-provider-*
have only one shared object and those are not linked against
libc and it's intentional so supressing error
library-not-linked-against-libc

There is needed dependency for Systemd DH plugin which
makes error missing-build-dependency-for-dh-addon obsolette.

Reworked debian/control that makes most of
version-substvar-for-external-package error not correct
so remove those that are not available anymore and update
those that are still relevant.

NOTE TO MERGER: This is only up-to MariaDB 10.10.