RFR: JDK-8320168: handle setsocktopt return values [v3]

[Matthias Baesken]

On Sat, 18 Nov 2023 08:02:23 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> Looks fine, if you are doing any further edits then I think the Windows code should check for SOCKET_ERROR rather than < 0.

I adjusted the checks to SOCKET_ERROR.

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PR Comment: https://git.openjdk.org/jdk/pull/16684#issuecomment-1818435490