[gnutls-devel] GnuTLS | WIP: add support for 0-RTT (!775)

[Development of GNU's TLS library]

Daiki Ueno commented on a discussion on doc/cha-gtls-app.texi:

>  @funcref{gnutls_init}, and the @funcref{gnutls_handshake} function will
>  return early, allowing the server to send data earlier.
>  
> -Under TLS 1.3, when the server and client share a @acronym{PSK}, the
> -client side can start transmitting application data during handshake.
> -This is called zero round-trip time (0-RTT) mode, and the application
> -data sent in this mode is called early data.
> +
> + at node Zero-roundtrip mode
> + at subsection Zero-roundtrip mode
> +
> +Under TLS 1.3, when the client has already connected to the server and
> +is resuming a session, it can start transmitting application data during
> +handshake.  This is called zero round-trip time (0-RTT) mode, and the
> +application data sent in this mode is called early data.  The client can
> +send early data with @funcref{gnutls_record_send_early_data}.

It is mentioned in the function documentation, but let me add it here as well.

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