support multiple path patterns per route/handler

[jknack]

a common example is to have a create/update handler where the id is optional for create and present for update, something like:

post("/model", "/model/:id", req -> {
  Optional<String> id = req.param("id").toOptional(String.class);
  ...
});

In addition org.jooby.mvc.Path should support multiples patterns too:

@Path({"/model", "/model/:id"})
@GET
public Object createORUpdate(Optional<String> id) {
  ...
}