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1. add new options --disable-incremental , which is used for new client to connect to older servers before 2.3.0.

Proposed Changes

Use incrementalAlterConfigs without --disable-incremental flag when alter broker configs, which will fail if the broker is before 2.3.0.

here is an example of changing the broker configs twice, log.cleaner.threads=2Describe the new thing you want to do in appropriate detail. This may be fairly extensive and have large subsections of its own. Or it may be a few sentences. Use judgement based on the scope of the change.

Compatibility, Deprecation, and Migration Plan

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Test Plan

Describe in few sentences how the KIP will be tested. We are mostly interested in system tests (since unit-tests are specific to implementation details). How will we know that the implementation works as expected? How will we know nothing broke?

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