RFR: 8312443: sun.security should use toLowerCase(Locale.ROOT)

[John Jiang]

On Thu, 20 Jul 2023 09:29:50 GMT, John Jiang <jjiang at openjdk.org> wrote:

> sun.security codes should use `toLowerCase(Locale.ROOT)` instead of `toLowerCase()`.
> In addition, no `toUpperCase()` was found in this code scope.

@XueleiFan 
Thanks for your review!

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PR Comment: https://git.openjdk.org/jdk/pull/14948#issuecomment-1644647852