refactor validator selection using a content type based dictionnary (which may be overriden by view id) + functions to instrumentize the registry to check what's tested and what's not

.. -*- coding: utf-8 -*-

Advanced
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.. toctree::
   :maxdepth: 1

   B4010-configuration.en.txt
   B4020-dbapi.en.txt
   B4030-registry.en.txt
   B4040-rss-xml.en.txt