Protocol config option

[koljenovic]

Evidently a lot of people are still have quic connectivity problems after 2022.3.4 (myself included) that they cannot do much about themselves as it's ISP related most of the time and in k8s case pods never reach http2 when set to auto if quic does not connect, instead they enter a crash loop, so it would make sense to include an optional protocol config option as a remedy.