to supervisor.cfg as it's only used in the latter for now and the
former may not be used, for instance when using only cloudooo.

Also update the definitions of section-extender following the changes
in erp5.extension.sectionextender.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41838 20353a03-c40f-0410-a6d1-a30d3c3de9de