Removed unmaintained HelpSys documents from ZCatalog and PluginIndexes. Useful explanations are given inside the form templates.

- no need to re-raise Redirect in raise_standardErrorMessage (ZPublisherExceptionHook is responsible for that)

More catalog work, merge in the non-queryplan and non-btree changes of queryplan and optimize more of date range index internals

Deprecate Products.ZCatalog's current behavior of returning the entire catalog content if no query restriction applied. In Zope 2.14 this will result in an empty LazyCat to be returned instead.

Deprecate acquiring the request inside Products.ZCatalog's searchResults method if no explicit query argument is given.

Make the report query key calculations saner, by sanitizing the query and actually using it to execute the queries. Otherwise there's too much potential for differences in the key calculation and the actual index search code.