RFR: JDK-8313782: Add user-facing warning if THPs are enabled but cannot be used [v2]

[Thomas Stuefe]

On Tue, 15 Aug 2023 09:07:13 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Davids feedback
>
> Looks good.

Thanks @kstefanj  and @dholmes-ora !

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PR Comment: https://git.openjdk.org/jdk/pull/15158#issuecomment-1678631386