Respect puppet::server::additional_settings parameter

Previously it was read from the main puppet class, instead of
puppet::server (which in turn defaulted to the parameter from the main
class).

Author: ekohl

manifests/server/config.pp

@@ -95,7 +95,7 @@
     }
   }
 
-  $puppet::server_additional_settings.each |$key,$value| {
+  $puppet::server::additional_settings.each |$key,$value| {
     puppet::config::server { $key: value => $value }
   }