RFR: 8353749: Improve security warning when using JKS or JCEKS keystores

[Hai-May Chao]

This PR improves security warning when using JKS or JCEKS keystores.

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Commit messages:
 - Merge
 - 8353749: Improve security warning when using JKS or JCEKS keystores

Changes: https://git.openjdk.org/jdk/pull/27624/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27624&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353749
  Stats: 350 lines in 9 files changed: 329 ins; 0 del; 21 mod
  Patch: https://git.openjdk.org/jdk/pull/27624.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27624/head:pull/27624

PR: https://git.openjdk.org/jdk/pull/27624