[jdk25u] RFR: 8364257: JFR: User-defined events and settings with a one-letter name cannot be configured

[duke]

On Fri, 5 Sep 2025 00:44:28 GMT, Rui Li <duke at openjdk.org> wrote:

> A clean backport for https://bugs.openjdk.org/browse/JDK-8364257
> 
> This fixes a bug where a single letter name jfr event couldn't be configured. On tip for about one month. The test `test/jdk/jdk/jfr/api/flightrecorder/TestSettingsControl.java` passed locally. Other tests are running. Relatively low risk.

@rgithubli 
Your change (at version 4eb1d68717d2b9e83e76ac86cf53d198b8b8561c) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk25u/pull/171#issuecomment-3258660493