Fix bug in emqx_frame

src/emqx_frame.erl

@@ -127,7 +127,7 @@ parse_packet(#mqtt_packet_header{type = ?CONNECT}, FrameBin, _Options) ->
       WillQoS      : 2,
       WillFlag     : 1,
       CleanStart   : 1,
-      0            : 0,         
+      0            : 1,         
       KeepAlive    : 16/big,
       Rest2/binary>> = Rest1,