RFR: 8370890: Start of release updates for JDK 27 [v4]

[Iris Clark]

On Mon, 10 Nov 2025 16:15:38 GMT, Nizar Benalla <nbenalla at openjdk.org> wrote:

>> Get JDK 27 underway.
>
> Nizar Benalla 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 six additional commits since the last revision:
> 
>  - Updates due to the generate-symbol-data.sh location changing in 8367259
>  - Updates due to the generate-symbol-data.sh location changing in 8367259
>  - Merge branch 'master' into start-of-release-27
>  - update links to JVMS 26 and 27
>  - add missing enum
>  - initial commit start-of-JDK-27

Expected changes for JDK 27 looking good.

make/conf/version-numbers.conf line 36:

> 34: DEFAULT_VERSION_EXTRA2=0
> 35: DEFAULT_VERSION_EXTRA3=0
> 36: DEFAULT_VERSION_DATE=2026-09-15

Anticipated GA date confirmed.

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PR Review: https://git.openjdk.org/jdk/pull/28130#pullrequestreview-3444133407
PR Review Comment: https://git.openjdk.org/jdk/pull/28130#discussion_r2511223183