RFR: 8260923: Add more tests for SSLSocket input/output shutdown

[Sean Coffey]

On Tue, 2 Mar 2021 10:31:03 GMT, Abdul Kolarkunnu <akolarkunnu at openjdk.org> wrote:

>> There is a lack of tests in the area of  java.net.Socket.shutdownInput() and java.net.Socket.shutdownOutput() , so added more tests in this area of with different TLS versions. Please review.
>
> @coffeys

Thanks for increasing code coverage here. Looks fine to me.

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PR: https://git.openjdk.java.net/jdk/pull/2745