Client returns a TLS configuration meant to be used by a client.

Server returns a TLS configuration meant to be used by a server.

ClientDefault is a secure-enough TLS configuration for the client TLS configuration.

For use by code which already has a crypto/tls options struct but wants to use a commonly accepted set of TLS cipher suites, with known weak algorithms removed.

ServerDefault is a secure-enough TLS configuration for the server TLS configuration.

Options represents the information needed to create client and server TLS configurations.