RFR: 8367981: Update CompactHashtable comments [v5]

[Ioi Lam]

On Wed, 24 Sep 2025 08:34:33 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> Hi,
>> Can you help to review this patch?
>> 
>> The comments of CompactHashtable and related classes are out of date, and some comments are unclear, wrong or misleading.
>> As the related classes are used in more and more scenarios, it's helpful to update the comments.
>> 
>> Thanks
>
> Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:
> 
>   rename 2

LGTM!

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Marked as reviewed by iklam (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27360#pullrequestreview-3264910554