Enable GTID replication master failover

Using Galera Nodes , Tree topology or Maxscale binlog servers it would be intersting to add

CHANGE MASTER TO MASTER_HOST='node1,node2,node3' syntax and in case of io thread stop try to auto failover on the list of nodes , additional options
CHANGE MASTER TO MASTER_HOST='node1,node2,node3' , MASTER_AUTO_FAILBACK=1 would ne a good addition as well