RFR: 8373515: Migrate "test/jdk/java/net/httpclient/" to null-safe "SimpleSSLContext" methods [v4]

[Jaikiran Pai]

On Thu, 18 Dec 2025 13:53:15 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

>> Migrates `test/jdk/java/net/httpclient/` to null-safe `SimpleSSLContext` methods introduced in [JDK-8372661], which is a prerequisite for this change set.
>> 
>> [JDK-8372661]: https://bugs.openjdk.org/browse/JDK-8372661
>
> Volkan Yazici has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:
> 
>  - Merge remote-tracking branch 'upstream/master' into simpleSslHc
>  - Merge remote-tracking branch 'upstream/master' into simpleSslHc
>  - Make sure `get()` returns the same instance
>  - Restore `test/jdk/java/net/httpclient/` changes
>  - Reverted all changes and only kept `SimpleSSLContext` enhancements
>  - Overhaul `SimpleSSLContext` and its usages

Thank you for doing this cleanup. Looks simple but is involved because of the number of places this change was required. Apart from one issue to a test change, that I added as a review comment, the rest looks good to me.

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PR Comment: https://git.openjdk.org/jdk/pull/28771#issuecomment-3713347821