bsddb module updated to version 4.7.2devel9.

This patch publishes the work done until now
for Python 3.0 compatibility. Still a lot
to be done.

When possible, we use 3.0 features in Python 2.6,
easing development and testing, and exposing internal
changes to a wider audience, for better test coverage.

Some mode details:
http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.2
diff --git a/Lib/bsddb/dbutils.py b/Lib/bsddb/dbutils.py
index 9a2f010..8d2e7ef 100644
--- a/Lib/bsddb/dbutils.py
+++ b/Lib/bsddb/dbutils.py
@@ -26,7 +26,13 @@
 #
 from time import sleep as _sleep
 
-import db
+import sys
+absolute_import = (sys.version_info[0] >= 3)
+if absolute_import :
+    # Because this syntaxis is not valid before Python 2.5
+    exec("from . import db")
+else :
+    import db
 
 # always sleep at least N seconds between retrys
 _deadlock_MinSleepTime = 1.0/128