MDL-24203 Fixed coding style and added more explanation of the reason to put...

MDL-24203 Fixed coding style and added more explanation of the reason to put the value $CFG->lang into config.php

config-dist.php

@@ -347,9 +347,12 @@ $CFG->admin = 'admin';
 //
 //     $CFG->themedir = '/location/of/extra/themes';
 //
-// This setting is for localised error messages for database connection problems:
-//     $CFG->lang="yourlangcode";
-
+// Site default language can be set via standard administration interface. If you
+// want to have initial error messages for eventual database connection problems
+// localized too, you have to set your language code here.
+//
+//     $CFG->lang = 'yourlangcode'; // for example 'cs'
+//
 //=========================================================================
 // 8. SETTINGS FOR DEVELOPMENT SERVERS - not intended for production use!!!
 //=========================================================================