Removed the automatic 302 redirects for ARI URL's that end with a slash.

There were some problems redirecting RESTful API requests; notably the client
would change the request method to GET on the redirected requests. After some
looking into, I decided that a 404 would be simpler and have more consistent
behavior.


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@393083 f38db490-d61c-443f-a65b-d21fe96a405b