Reimplemented permanent URLs as it should have been: with __bobo_traverse__. We do not need anylonger with this to specify the webmaster as we did. Security is taken into account to access permanent URL documents. One remaining issue: support of transactional cache in __bobo_traverse__.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19219 20353a03-c40f-0410-a6d1-a30d3c3de9de