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• Jira
  server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key ZOOKEEPER-4396

  - Zookeeper used plaintext passwords for its trust and key stores. This change makes files which store those passwords take precedence, but they don't remove the already working logic. This change should not affect the proposed upgrade.

No other Zookeeper APIs which Kafka uses appear to have been changed.

• If we are changing behavior how will we phase out the older behavior? It should gradually be phased out as users update their Kafka versions
• If we need special migration tools, describe them here. N/A
• When will we remove the existing behavior? N/A

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