Should be able to configure MASTER_SSL_VERIFY_SERVER_CERT value

It would be good to have the MASTER_SSL_VERIFY_SERVER_CERT be configurable so that when Maxscale calls CHANGE MASTER TO the value will be picked up and used as an option.

This has been unsuccessful in MariaDB 10.3.28-1:
STOP SLAVE;
CHANGE MASTER TO MASTER_HOST='127.0.0.1', MASTER_PORT=3306, MASTER_SSL_VERIFY_SERVER_CERT=1;
START SLAVE;

STOP SLAVE;
CHANGE MASTER TO MASTER_HOST='mydb.myhost.com';
START SLAVE;