[nginx] support http2 per server

[Valentin V. Bartenev]

On Thursday 08 June 2017 12:07:29 洪志道 wrote:
> Hi!
> Now, http2 is enabled globally for 'listen' directive with ip:port.
> It seems it's possible to enable by server with sni, alpn, npn.
> Take a look, please.
> 
[..]

How will "sni, alpn, npn" prevent browser from asking other virtual
servers using already opened HTTP/2 connection?

   wbr, Valentin V. Bartenev