HandleHTTPRequest: store capture groups in regex as properties

It would be great to store capture groups specified in the regex of the "Allowed paths" property of the HandleHTTPRequest processor.
It could allow to easily create a REST API, as we could specify some parameters in the URL that would be automatically parsed.

Ex :

^\/device\/([-\w\d]+)\/data$

Would accept the URL

http://localhost/device/01/data

and automatically create the attribute

http.request.params.1 = "01"