Subdomain Routing: allow for matching URL patterns to domains and sub-domain parts; great for multi-tenant apps

A domain can be specified on a route or with closure.
The incoming domain must match the domain in order for the route to be a match.
Additionally, a wildcard or parameter can exist in the route, like :username.forgebox.io.
The value of username (in this case) will exist in the rc scope.

Examples: