Authenticate as server async

[ATS-CE]

• use CancellationToken within AuthenticateAsServerAsync to avoid infinite waiting for client starting TLS handshake (Client Hello)
• use SimpleTcpServerSettings.IdleClientEvaluationIntervalMs as wait time for TLS handshake

[jchristn]

Integrated manually, with changes.

NuGet: https://www.nuget.org/packages/SuperSimpleTcp/3.0.4 Commit: https://github.com/jchristn/SuperSimpleTcp/commit/7e9b402016409940260cd541f28874814bb71010

Thank you so much for your contributions!!