HTTP/2 Upgrade support
In "can I use" website I can see Opera has complete HTTP/2 support: http://caniuse.com/#feat=http2 , meaning that it also supports the HTTP/2 without TLS ALPN (aka: h2c).
However I do not see Opera 33 sending the
Upgrade: h2cheader. Is caniuse.com wrong? or has this support to be enabled somehow?