Remove self-links with domain names in docs (#4299)

* Remove self-links with domain names in docs

Fixes #4191. Skipping the tutorials we import from kubernetes/examples.

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

* update federation/index.md user-guide links

* update assign-pod-node.md links

* update dns-pod-service.md link

* update link in jobs-run-to-completion.md

* update link in minikube.md

* update PS link in minikube.md

* update links in stackpoint.md

* update links in storage.md

* fix link in vsphere.md

* fix links in deprecation-policy.md

* Update pick-right-solution.md

* Update web-ui-dashboard.md

* Update ingress.md

* Update federation-service-discovery.md

* Update user-guide.md

* Update expose-external-ip-address.md

* Update README.md

* Update README.md

docs/tasks/debug-application-cluster/debug-service.md

@@ -567,7 +567,7 @@ There are three things to check:
 
 This mostly happens when `kube-proxy` is running in `iptables` mode and Pods
 are connected with bridge network. The `Kubelet` exposes a `hairpin-mode`
-[flag](http://kubernetes.io/docs/admin/kubelet/) that allows endpoints of a Service to loadbalance back to themselves
+[flag](/docs/admin/kubelet/) that allows endpoints of a Service to loadbalance back to themselves
 if they try to access their own Service VIP. The `hairpin-mode` flag must either be
 set to `hairpin-veth` or `promiscuous-bridge`.