Varnish5 builtin VCL without pipe

[Dridi Boukelmoune]

On Wed, Apr 6, 2016 at 5:02 PM, Federico Schwindt <fgsch at lodoss.net> wrote:
> Can you elaborate? How is Upgrade related to OPTIONS?

It isn't, only the Upgrade header is important. You can use OPTIONS as
a neutral request to try a protocol switch. But the question remains
for status codes like 101 (Switching Protocol) or 426 (Upgrade
Required).

Dridi