RFR: 8311653: Modify -XshowSettings launcher behavior

[Alan Bateman]

On Mon, 24 Jul 2023 16:00:52 GMT, Sean Coffey <coffeys at openjdk.org> wrote:

> Modify the -XshowSettings launcher option to print non-verbose settings details of all components by default. Verbose settings details will be printed via the -XshowSettings:all option. Modify the -XshowSettings option to reject bad values passed to it. Print an error message in such scenarios and abort the VM launch.

This looks quit good,  I'm just wondering about the usage messages for -XshowSetting and -XshowSetting:all as they both say "show all settings and continue". I think we'll need to adjust the first one to say that it just shows a summary of the settings.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/15001#issuecomment-1648395988