MDEV-38787 wsrep_slave_fk_checks=OFF results in inconsistency #4638
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Since ATM wsrep does not replicate any cascaded changes (because they are not binlogged in the upstream code) we have to rely on foreign checks on replicas to reproduce the cascade. Thus setting wsrep_slave_fk_checks=OFF will result in inconsistency in any setup where there are cascading relations. Mark this option as deprecated and make it a NOOP.
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Please cherry-pick this to 10.11.
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Since ATM wsrep does not replicate any cascaded changes (because they are not binlogged in the upstream code) we have to rely on foreign checks on replicas to reproduce the cascade. Thus setting wsrep_slave_fk_checks=OFF will result in inconsistency in any setup where there are cascading relations. Mark this option as deprecated and make it a NOOP.