Often a route.php file will have many N routes but only M controllers.
Where N >= M. Which means that in most cases the ControllerName will be
converted multiple times. This is of course far from ideal.
Note that this is per app so the cache will contain at most N entries.
Which is not to bad.
One of the possibilities of the old OCS API is that you can define the
url yourself.
This PR makes this possible again by adding an optional root elemenet to
the route. Routes are thus:
.../ocs/v2.php/<root>/<url>
By default <root> = apps/<app>
This will allow for example the provisioning API etc to be in
../ovs/v2/php/cloud/users
