Added a few more interfaces that should be needed.

lib/mdb/db.py

@@ -49,6 +49,10 @@ class PVVDB:
         # set the legal set of fields.
         pass
 
+    def __del__(self):
+        # clean up locks and such before being deleted.
+        pass
+
     def lock(self, username):
         # Lock the record.
         pass
@@ -67,3 +71,18 @@ class PVVDB:
         # the record if `lock' is True.  A `comment' can be supplied that
         # explains the changes made.
         pass
+
+
+#
+# Regular interface to the database.
+#
+def connect(path):
+    # returns a PVVDB instance to that path.  If asked for another
+    # PVVDB instance with the same path as earlier, it will return
+    # the same object.
+    pass
+
+def disconnect(dbo):
+    # do not do anything, really.  PVVDB objects will clean up
+    # automatically when deleted.
+    pass