RFR: Use ThreadGroup for passive connection

[Dmitry Bessonov]

On Thu, 22 Feb 2024 08:54:33 GMT, moritz-bruder <duke at openjdk.org> wrote:

>> Passive connections use a separate thread to ensure interruptible IO. Since this is technically part of the test setup it should use a separate ThreadGroup.
>> 
>> Please let me know if anything else is needed or you want to see any changes. I was trying to follow your processes but found a lot of dead links.
>
> I do not have anything to add.  I am waiting for a review or a discussion.

@moritz-bruder could you please provide more details of the problem that is being solved by this enhancement, link to any JBS bug IDs etc.

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PR Comment: https://git.openjdk.org/jtharness/pull/58#issuecomment-1959259876