Integrated: 8246037: Shenandoah: update man pages to mention -XX:+UseShenandoahGC

[Rui Li]

On Fri, 22 Aug 2025 18:36:04 GMT, Rui Li <duke at openjdk.org> wrote:

> Add documentation of Shenandoah to java man page
> 
> Aside from `-XX:+UseShenandoahGC`, I picked flags from [shenandoah_globals.hpp](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp) that are at product level but not experimental / diagnostic to avoid overwhelming info. Two additional flags match: `ShenandoahGCMode` and `ShenandoahGCHeuristics`

This pull request has now been integrated.

Changeset: 5052a7ee
Author:    Rui Li <ruiamzn at amazon.com>
Committer: Kelvin Nilsen <kdnilsen at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/5052a7eee57e9d145950a0ab1ca71edc02bfe0be
Stats:     44 lines in 2 files changed: 42 ins; 0 del; 2 mod

8246037: Shenandoah: update man pages to mention -XX:+UseShenandoahGC

Reviewed-by: ysr, wkemper, cslucas

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PR: https://git.openjdk.org/jdk/pull/26907