SPDY + HTTP/2

[mongia.ramandeep]

I was able to patch nginx-1.9.10 which supports both SPDY + HTTP2. I don't
intend to use both of them simultaneously on the same interface. 

My question: Is there a reason why this is not done? It gives me an option
to choose between the two per interface. 

server {
    listen x.x.x.x:443 ssl http2;
    server_name  abc.com;
...
}
server {
    listen y.y.y.y:443 ssl spdy;
    server_name  def.com;
...
}

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,263245,264414#msg-264414