[grilo] doc: Clearify that GrlConfig are not persistant

[Mathias Hasselmann <hasselmm src gnome org>]

commit b7f72ed49bed240a5452d9a60e15bbd038a4ccd2
Author: Mathias Hasselmann <mathias openismus com>
Date:   Tue Jul 10 10:11:56 2012 +0200

    doc: Clearify that GrlConfig are not persistant

 src/data/grl-config.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/data/grl-config.c b/src/data/grl-config.c
index 34349ee..352054e 100644
--- a/src/data/grl-config.c
+++ b/src/data/grl-config.c
@@ -28,7 +28,11 @@
  * SECTION:grl-config
  * @short_description: Configuration data storage
  *
- * This class is used to store configuration settings used by plugins.
+ * This class is used to configure plugins during a session.
+ *
+ * Pre-defined settings are read from plugin specific configuration files.
+ * The settings can be change to properly setup the session, but are not persistet.
+ * Changes are local to each #GrlConfig instance.
  */
 
 #include "grl-config.h"