A server config being constructed. A builder can be modified by,
e.g. rustls_server_config_builder_load_native_roots. Once you're
done configuring settings, call rustls_server_config_builder_build
to turn it into a *const rustls_server_config. This object is not safe
for concurrent mutation.
<https://docs.rs/rustls/0.20.0/rustls/struct.ConfigBuilder.html>
A server config being constructed. A builder can be modified by, e.g. rustls_server_config_builder_load_native_roots. Once you're done configuring settings, call rustls_server_config_builder_build to turn it into a *const rustls_server_config. This object is not safe for concurrent mutation. <https://docs.rs/rustls/0.20.0/rustls/struct.ConfigBuilder.html>