Some bsddb changes

* allow to use bsddb3 as database via a config setting
  * set async write to disk to improve speed, eg import * 40


svn: r16446

src/gen/plug/_gramplet.py

@@ -21,7 +21,11 @@
 
 # $Id$
 
-import bsddb
+import config
+if config.get('preferences.use-bsddb3'):
+    import bsddb3 as bsddb
+else:
+    import bsddb
 import types
 from gen.ggettext import gettext as _