support 304 (Not Modified) response where we support caching policy manager.
support 'Cache-Control: public' in Accelerated HTTP Cache Manager.
Test: warn before removing static files
ui test: chain Bar to foo_workflow
Test folder workflow action on a module containing multiple portal types
Folder Worklow Action: fix for modules containing objects of different portal types
Accounting: Fix bug with closing period when all accounts have 0 balance
Catalog: raise error when provided unknown query parameters

This behaviour can be disabled:
 - for a given query, by passing ignore_unknown_query_parameter=True. This can
   be helpful if you pass user parameters to the catalog, like listbox does.
 - globally, by setting sql_catalog_raise_error_on_unknown_query_parameter
   property on catalog. This can be helpful if you just want to hide errors to
   users without having to fix the code.