Noted long-standing but silent deprecation of Zope2-style interfaces

o Issue deprecation warning on import of the Interface package). That package
  is already gone on the trunk.

doc/CHANGES.txt

@@ -4,6 +4,14 @@ Zope Changes
   Change information for previous versions of Zope can be found in the
   file HISTORY.txt.
 
+  After Zope 2.11 rc 1
+
+    Restructuring
+
+      - Noted long-standing but silent deprecation of Zope2-style
+        interfaces (on import of the Interface package).  That package
+        is already gone on the trunk.
+
   Zope 2.11 rc 1 (2008/05/08)
 
     Bugs Fixed

lib/python/Interface/__init__.py

@@ -66,6 +66,11 @@ create interface skeletins. Run it without arguments to get documentation.
 Revision information:
 $Id$
 """
+import warnings
+warnings.warn(
+    'The Interface package is deprecated and will be removed '
+    'in Zope 2.12. Use zope.interface instead.',
+    DeprecationWarning, stacklevel=2)
 
 from _Interface import Interface
 from Attribute import Attribute