Add TlsMixedModeTests verifying that a server with AllowNonTls=true accepts both plaintext and TLS clients on the same port. Add MonitorTlsTests verifying that /connz reports TlsVersion and TlsCipherSuite for TLS-connected clients.
Add TlsMixedModeTests verifying that a server with AllowNonTls=true accepts both plaintext and TLS clients on the same port. Add MonitorTlsTests verifying that /connz reports TlsVersion and TlsCipherSuite for TLS-connected clients.