[WIP] Idling Proposal

Is this saying that you don't want the edge router to forward a request for an idled service to a collocated unidler proxy? I can understand the concern about shared state, but you'll potentially have that problem even if you restrict unidling to the kube-proxy. Imagine you have pods P1, P2 on nodes N1, N2 respectively. If a container in P1 tries to contact some service S1 via N1's kube-proxy, that would begin the unidling process for S1. If a container in P2 tries to contact the S1 service via N2's kube-proxy, you don't want N2's kube-proxy also attempting to resize the replication controller. You want it to buffer the connection and wait for the unidling to finish.