mv 'forced_subscriptions' option to {mqtt, {client, ...

rel/files/emqttd.config

@@ -67,6 +67,8 @@
         ]},
         %% Client
         {client, [
+            %% Subscribe topics automatically when client connected
+            {forced_subscriptions, [{"$Q/client/$c", 0}]}
             %TODO: Network ingoing limit
             %{ingoing_rate_limit, '64KB/s'}
             %TODO: Reconnet control
@@ -86,9 +88,6 @@
         %% System interval of publishing broker $SYS messages
         {sys_interval, 60},
 
-        %% Subscribe these topics automatically when client connected
-        {forced_subscriptions, [{"$Q/client/$c", 0}]},
-
         %% Retained messages
         {retained, [
             %% Max number of retained messages