Change master add new --force option

[linuxgood1230]

Use Web to change master, it dose not pre check master and slave gtid set.
mysql 5.6./5.7
slave's gtid_executed must be superset of master's gtid_purged,
or it will change master faild

When I want force set slave's GTID_EXECUTED to change successful

[shlomi-noach]

Use Web to change master

Can you clarify what you are trying to do? Web interface doesn't change master. Or is it a failover operation? Or is it an intermediate master? Please be more explicit