Add a warning about selection parameter deprecation.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26553 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/Selection.py

@@ -205,6 +205,8 @@ class Selection(Acquisition.Implicit, Traversable, Persistent):
           del kw['sort_on'] # We should not sort if no sort was defined
         # We should always set selection_name with self.name
         kw['selection_name'] = self.name
+        # XXX: Use of selection parameter is deprecated. Use selection_name
+        # instead, and access the selection via selection_tool.
         kw['selection'] = self
         if self.domain is not None:
           kw['selection_domain'] = self.domain