RFR: 8299852: Modernize ConcurrentHashMap

[Per Minborg]

On Tue, 10 Jan 2023 12:04:10 GMT, Pavel Rappo <prappo at openjdk.org> wrote:

> I'm sure others will note or have already noted elsewhere that we don't do direct PRs against JSR 166.

Yes. I will change the PR to a draft as we explore ways to integrate the spirit of the proposed changes.

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PR: https://git.openjdk.org/jdk/pull/11924