Disallow trailing slashes in url

[nadar]

Now the cms url's are valid with trailing slash, but the cms url generator never returns urls with urlManger suffix. Therefore URLs with trailing slashes are invalid urls and 404 should be thrown.

[rolandschaub]

I don't think it should throw an error but redirect to the same URL without trailing slash (permanent redirection).

[nadar]

@rolandschaub you are right, but lets make another issue for this.