[jdk21u] Integrated: 8308593: Add KEEPALIVE Extended Socket Options Support for Windows

[Terry Chow]

On Tue, 29 Aug 2023 17:08:31 GMT, Terry Chow <duke at openjdk.org> wrote:

> This is a clean backport of [JDK-8308593](https://bugs.openjdk.org/browse/JDK-8308593), which provides support for the keepalive extended socket options on Windows.
> 
> Tier 1 tests were ran and they're passing along with the existing keepalive tests. I also manually tested and confirmed the patch to be working on Windows (specifically Windows 10 since that's the only Windows platform available to me at the moment).

This pull request has now been integrated.

Changeset: 19279305
Author:    Terry Chow <v-terrychow at microsoft.com>
Committer: Severin Gehwolf <sgehwolf at openjdk.org>
URL:       https://git.openjdk.org/jdk21u/commit/19279305d543857a0d89ff8990493c7d05425feb
Stats:     210 lines in 9 files changed: 169 ins; 0 del; 41 mod

8308593: Add KEEPALIVE Extended Socket Options Support for Windows

Backport-of: f3ade388dac0b882e671462caa762138f44817fb

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PR: https://git.openjdk.org/jdk21u/pull/117