modules/http: patched h2_stream

modules/http/http.mk

 http_SOURCES := http.lua prometheus.lua
 http_INSTALL := $(wildcard modules/http/static/*) \
+				modules/http/http/h2_stream.lua \
                 modules/http/http/h2_connection.lua \
                 modules/http/http/server.lua
 $(call make_lua_module,http)

modules/http/http/h2_connection.lua

@@ -173,7 +173,7 @@ function connection_methods:events()
 end
 
 function connection_methods:timeout()
-	if not self:empty() then
+	if self.cq:empty() then
 		return 0
 	end
 end