Add methods to retrieve the router and handler from prometheus/web

This is necessary for middleware to reuse the prometheus web UI endpoints etc.

web/web.go

@@ -593,6 +593,15 @@ func (h *Handler) SetReady(v ReadyStatus) {
 
 	h.ready.Store(uint32(v))
 	h.metrics.readyStatus.Set(0)
+	h.ready.Store(1)
+}
+
+func (h *Handler) GetRouter() *route.Router {
+	return h.router
+}
+
+func (h *Handler) Getv1API() *api_v1.API {
+	return h.apiV1
 }
 
 // Verifies whether the server is ready or not.