RFR: 8294626: Improve URL protocol lower casing

Fri Sep 30 11:02:31 UTC 2022

On Fri, 30 Sep 2022 10:39:37 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> Move a simple utility method from `URL` to the shared `sun.net.util.URLUtil` class, rename it for clarity and enhance it so that it returns the string literal if the protocol matches one of the tested variants. This helps reduce dependencies from bootstrap code on `Locale` while improving the performance and allocation pressure in certain applications.

I agree with Alan.

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PR: https://git.openjdk.org/jdk/pull/10506