Deactivation of the raw directive: ..raw:: by an option of the Sphinx builder
Allows html not parsed by rst - that's a security issue
Info:
http://docutils.sourceforge.net/docs/ref/rst/directives.html#raw-data-pass-through
http://docutils.sourceforge.net/docs/user/config.html#raw-enabled
.. include:: has the same warning too
http://docutils.sourceforge.net/docs/ref/rst/directives.html#including-an-external-document-fragment
http://docutils.sourceforge.net/docs/user/config.html#file-insertion-enabled