Remove SPDY; document HTTP/2

I just replaced "SPDY" with "HTTP/2" in the documentation.
I suspect that's all that's needed, but if there's something
off we can fix it later.

1 files changed, 4 insertions, 4 deletions

diff --git a/doc/src/guide/connect.asciidoc b/doc/src/guide/connect.asciidoc
index c2e887c..e0b09d6 100644
--- a/doc/src/guide/connect.asciidoc
+++ b/doc/src/guide/connect.asciidoc
@@ -5,10 +5,10 @@ a connection using the Gun client.
 
 === Gun connections
 
-Gun is designed with the SPDY and Websocket protocols in mind.
+Gun is designed with the HTTP/2 and Websocket protocols in mind.
 They are built for long-running connections that allow concurrent
 exchange of data, either in the form of request/responses for
-SPDY or in the form of messages for Websocket.
+HTTP/2 or in the form of messages for Websocket.
 
 A Gun connection is an Erlang process that manages a socket to
 a remote endpoint. This Gun connection is owned by a user
@@ -35,8 +35,8 @@ The `gun:open/{2,3}` function must be used to open a connection.
 
 If the port given is 443, Gun will attempt to connect using
 SSL. The protocol will be selected automatically using the
-NPN extension for TLS. By default Gun supports SPDY/3.1,
-SPDY/3 and HTTP/1.1 when connecting using SSL.
+ALPN extension for TLS. By default Gun supports HTTP/2
+and HTTP/1.1 when connecting using SSL.
 
 For any other port, Gun will attempt to connect using TCP
 and will use the HTTP/1.1 protocol.