RFR: 8351354: Enhance java -XshowSettings:security:tls to show enabled TLS groups [v3]

[Sean Mullan]

On Wed, 3 Sep 2025 19:35:27 GMT, Matthew Donovan <mdonovan at openjdk.org> wrote:

>> In this PR I added TLS groups and signature algorithms to the output of the show settings flag. The values are printed in a single column, like the cipher suites. There can be a lot of values so putting on a single line is ugly. I tried putting them in columns, but it is hard to read.
>
> Matthew Donovan has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
> 
>  - I removed signature algorithms output because the information is created during TLS handshake
>  - Merge branch 'master' into secsettings
>  - removed unused import, updated tools/launcher/Settings.java test
>  - Merge branch 'master' into secsettings
>  - 8351354: Enhance java -XshowSettings:security:tls to show enabled TLS groups and signature algorithms

src/java.base/share/classes/sun/launcher/SecuritySettings.java line 140:

> 138:             }
> 139: 
> 140:             ostream.println("\n" + TWOINDENT + "Enabled Groups:");

Change this to "Enabled Named Groups:". This would be more consistent with the API (`get/setNamedGroups`) and the Named Groups section of the Standard Algorithm Names spec.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24424#discussion_r2414604767