-  Add dedicated form_render in RSS (rss_view) which can be used to hard code that a form must be rendered in RSS

- Make it possible to really render *any* existing form in RSS by setting dynamically in URL 'portal_skin=RSS '

- Use proper html_quote function

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@22542 20353a03-c40f-0410-a6d1-a30d3c3de9de