RFR: 8301381: Verify DTLS 1.0 cannot be negotiated

[Xue-Lei Andrew Fan]

On Fri, 19 May 2023 12:03:54 GMT, Matthew Donovan <mdonovan at openjdk.org> wrote:

> This PR implements a test to verify that a DTLS server running "out of the box" (i.e., DTLSv1.0 disabled in java.security) will not handshake with a client requesting DTLSv1.0. The test also implements the opposite: a client won't handshake with a server that uses DTLSv1.0.

Marked as reviewed by xuelei (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/14059#pullrequestreview-1434532784