RFR: JDK-8320168: handle setsocktopt return values [v4]

[Alan Bateman]

On Mon, 20 Nov 2023 08:23:51 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> There are a few places in the JDK C coding where the setsocktopt return value is not handled but better should be handled.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Windows: check for SOCKET_ERROR; remove comment line

Marked as reviewed by alanb (Reviewer).

-------------

PR Review: https://git.openjdk.org/jdk/pull/16684#pullrequestreview-1739200427