After this commit, if an url with trailing slash is not found we fallback
to the url without the slash with a redirect to respect seo.
With this change we have the same behavior that controllers.
We continue to support trailing slash if page explicitely created with /
via backend e.g. and for retrocompatibility.
task-2346185
closesodoo/odoo#58603
X-original-commit: 3d65424708d1623654756d58d78cec5f8d71276f
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>