MDEV-14977 10.2.12 libmariadb doesn't support old protocol
MDEV-14977 10.2.12 libmariadb doesn't support old protocol

fix the typo in the plugin name

MariaDB/mariadb-connector-c,MariaDB/mariadb-connector-c,ottok/mariadb-connector-c,ottok/mariadb-connector-c,ottok/mariadb-connector-c,MariaDB/mariadb-connector-c