NewEndpointController returns a new *EndpointController.

NewEndpointControllerFromClient returns a new *EndpointController that runs its own informer.

We'll attempt to recompute EVERY service's endpoints at least this often.

We must avoid syncing service until the pod store has synced.

An annotation on the Service denoting if the endpoints controller should go ahead and create endpoints for unready pods.

EndpointController manages selector-based service endpoints.