RFR: 8373537: Migrate "test/jdk/com/sun/net/httpserver/" to null-safe "SimpleSSLContext" methods [v3]

[Volkan Yazici]

On Tue, 16 Dec 2025 10:33:11 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> 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 simpleSslHs
>>  - Move `SSLContext::setDefault` to static blocks
>>  - Restore `test/jdk/com/sun/net/httpserver/` changes
>>  - Make sure `get()` returns the same instance
>>  - Reverted all changes and only kept `SimpleSSLContext` enhancements
>>  - Overhaul `SimpleSSLContext` and its usages
>
> LGTM. Obviously don't integrate before [JDK-8372661](https://bugs.openjdk.org/browse/JDK-8372661).

@dfuch, thanks so much for the review.

- [JDK-8372661](https://bugs.openjdk.org/browse/JDK-8372661) is integrated
- `test/jdk/com/sun/net/httpserver/` tests pass on 49befaf6dc2

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PR Comment: https://git.openjdk.org/jdk/pull/28800#issuecomment-3674984247