Migrating from Gun 1.2 to 1.3

Gun 1.3 improves the support for CONNECT requests introduced in the previous version and documents Websocket protocol negotiation.

Features added

• The protocols CONNECT destination option has been added as a replacement for the now deprecated protocol option.
• Add built-in support for Websocket protocol negotiation through the Websocket option protocols. The interface of the handler module currently remains undocumented and must be set to gun_ws_h.
• Add the h2specd HTTP/2 test suite from the h2spec project.

Bugs fixed

• Fix connecting to HTTP/2 over TLS origin servers via HTTP/1.1 CONNECT proxies.
• Do not send the HTTP/1.1 keepalive while waiting for a response to a CONNECT request.
• Do not crash on HTTP/2 HEADERS frames with the PRIORITY flag set.
• Do not crash on HTTP/2 HEADERS frames when the END_HEADERS flag is not set.
• Do not crash on unknown HTTP/2 frame types.
• Reject HTTP/2 WINDOW_UPDATE frames when they would cause the window to overflow.
• Send a GOAWAY frame on closing the HTTP/2 connection.