Removing /etc/init.d/mysql allows upgrade to complete successfully.
- Bug#864593: [mariadb-server-10.1] Fails to upgrade mirq-deboogs
- Bug#864593: [mariadb-server-10.1] Fails to upgrade mirq-deboogs
- Bug#864593: [debian-mysql] Bug#864593: [mariadb-server-... Ondřej Surý
