[Security] Make fake routes dumpable by setting NULL as controller

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #774
| License       | MIT

By setting `NULL` as controller, the route will end in 404 error if it's not bypassed by a security listener.