research: optional enabled property for routes

[mwcz]

If dynamic routes are needed, currently users need to modify the routes object after its declaration, as in:

if (process.env.ENABLE_FOO_ROUTES === 'true') {
    defaults.routes['/foo/bar'] = { host: "http://localhost:3000" };
}

It would be cleaner to define it within the routes object literal, like so:

routes: {
    '/foo/bar': {
        host: "http://localhost:3000",
        enabled: process.env.ENABLE_FOO_ROUTES === 'true'
    }
}

Main point of research is whether local routes can be defined this way, since they are string literals instead of object literals. I need to remind myself whether local paths can be defined as object literals too.