RFR: 8253635: Implement toString() for SSLEngineImpl

[Sean Coffey]

On Mon, 11 Jan 2021 04:57:19 GMT, Xue-Lei Andrew Fan <xuelei at openjdk.org> wrote:

> The SSLSocketImpl and SSLEngineImpl implementation does not override the toString() method.  The old code did.  BTW, I also made a few code clean up in the SSLSocketImpl.java.
> 
> Code clean up, trivial update, no new regression test.

Looks good

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Marked as reviewed by coffeys (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2019