RFR: JDK-8300416 java.security.MessageDigestSpi clone can result in thread-unsafe clones [v5]

[Goetz Lindenmaier]

On Tue, 7 Feb 2023 15:58:31 GMT, Mark Powers <mpowers at openjdk.org> wrote:

>> https://bugs.openjdk.org/browse/JDK-8300416
>
> Mark Powers has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Sean's test comment

Thanks for the advice! It backports clean and all tests are green, so I'll address this.

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PR Comment: https://git.openjdk.org/jdk/pull/12348#issuecomment-2470829796