Maxscale 2.5 binlog router no longer supports file/position based replication, only GTID based. So its CHANGE MASTER command does not support MASTER_LOG_FILE and MASTER_LOG_POS settings anymore either, which is understandable.
When trying to use these, one only gets back
instead of a clear message stating that these options, while valid with CHANGE MASTER in other contexts, is not supported by the new binlog router.
Expected result: something like: