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1. alterConfigs has been deprecated and will be removed in a future release;
2. we are using incrementalAlterConfigs to change user/topic/client-metrics configs, it would be benefit to unify broker configs.
3. incrementalAlterConfigs is more convenient especially for updating configs of list data type, such as "leader.replication.throttled.replicas" 

Public Interfaces

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kafka-configs.sh

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

Proposed Changes

Describe 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.

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