HTTP/3 in .NET 6

HTTP/3 runs over QUIC (UDP), not TCP. This eliminates Head-of-Line blocking.

builder.WebHost.ConfigureKestrel((context, options) =>
{
    options.ListenAnyIP(5001, listenOptions =>
    {
        listenOptions.Protocols = HttpProtocols.Http1AndHttp2AndHttp3;
    });
});