RFR: 8307547: Support for multiple collations for a locale [v2]

[Naoto Sato]

On Wed, 10 May 2023 20:28:11 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> The fix to https://bugs.openjdk.org/browse/JDK-8306927 switched the default collation for Swedish to the modern one. In order to provide a means for users who need the old collation, this PR intends to make `Collator` recognize the `co` Unicode locale extension so that multiple implementations for a locale can be provided. I would also like reviews for the corresponding CSR.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   http -> https

Thanks, Justin

> does it make sense to add some other locale's collation variants?

Maybe, but I am not seeing any requests for adding more collation variants. This enhancement is mainly for those who need the old Swedish collation as a workaround

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PR Comment: https://git.openjdk.org/jdk/pull/13917#issuecomment-1542854951