[IMP] Invert multilang logic in route decorator. True by default, can be set to False explicitlty
[FIX] restore request.website_multilang for templates
[IMP] Redirect to language-less url on default language
[MERGE] upstream
[FIX] properly set website_multilang attribute
[IMP] route@multilang default value inverted

The default value is now True for route@website=True controllers
Can be voided using multilang=False