Enhanced the internals of the DateRangeIndex based on an idea from experimental.daterangeindexoptimisations, thanks to Matt Hamilton.

``standard_html_footer`` from default DTML content.

Updated the default value for ``management_page_charset`` from iso-8859-1 to the nowadays more standard utf-8.

This event is fired just before IPubFailure, but, crucially, while the transaction is still open.

- keeping inofficial support for Python 2.5
- dropping any support for Python 2.4

Avoid possible errors on test tear-down in Products.Five.fiveconfigure's cleanUp() function if Products.meta_types has not been set

LP #411732: Silence security declaration warnings for context and request on views protected by an interface.