comment mysql plugins

rel/files/plugins.config

@@ -1,16 +1,16 @@
 [
- {emysql, [
-    {pool_size, 4},
-    {host, "localhost"},
-    {port, 3306},
-    {username, "root"}, 
-    {password, "public"},
-    {database, "mqtt"},
-    {encoding, utf8}
- ]},
- {emqttd_auth_mysql, [
-    {user_table, mqtt_users}
- ]}
+% {emysql, [
+%    {pool_size, 4},
+%    {host, "localhost"},
+%    {port, 3306},
+%    {username, "root"}, 
+%    {password, "public"},
+%    {database, "mqtt"},
+%    {encoding, utf8}
+% ]},
+% {emqttd_auth_mysql, [
+%    {user_table, mqtt_users}
+% ]}
 %
 % {emqttd_dashboard, [
 %    {listener,