Create a rustls_server_config_builder. Caller owns the memory and must
eventually call rustls_server_config_builder_build, then free the
resulting rustls_server_config. This uses rustls safe default values
for the cipher suites, key exchange groups and protocol versions.
Create a rustls_server_config_builder. Caller owns the memory and must eventually call rustls_server_config_builder_build, then free the resulting rustls_server_config. This uses rustls safe default values for the cipher suites, key exchange groups and protocol versions.