[jdk21u] RFR: 8309591: Socket.setOption(TCP_QUICKACK) uses wrong level

[Aleksey Shipilev]

On Mon, 14 Aug 2023 10:02:54 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Clean backport to fix TCP_QUICKACK bug.
> 
> Additional testing:
>  - [x] Linux AArch64 fastdebug, `jdk_net`
>  - [x] Linux AArch64 fastdebug, `tier1 tier2 tier3`

Testing is clean. Push approval is here.

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PR Comment: https://git.openjdk.org/jdk21u/pull/57#issuecomment-1686572533