The keybinding capplet now supports adding custom shortcuts. 

When the keybinding plugin in g-s-d gains lockdown support for custom keybindings,
the keybinding capplet should be updated to properly react to that, too.

The required code snipplet in the setup_dialog function looks roughly like this:

+  accepted_keys = gconf_client_get_list (client,
+                                         GCONF_BINDING_DIR "/accepted_keys",
+                                         GCONF_VALUE_STRING,
+                                         NULL);
+  if (accepted_keys != NULL)
+    {
+      g_slist_foreach (accepted_keys, (GFunc)g_free, NULL);
+      g_slist_free (accepted_keys);
+      gtk_widget_set_sensitive (WID ("add-button"), FALSE);
+    }