kubeadm-config: include new commands

Add notes and includes for these new commands in 1.11:
- kubeadm config print-default
- kubeadm config migrate

content/en/docs/reference/setup-tools/kubeadm/kubeadm-config.md

@@ -16,6 +16,10 @@ You can execute `kubeadm config view` to view the ConfigMap. If you initialized
 kubeadm v1.7.x or lower, you must use `kubeadm config upload` to create the ConfigMap before you
 may use `kubeadm upgrade`.
 
+In Kubernetes v1.11.0, a couple of new commands were added - `kubeadm config print-default`
+and `kubeadm config migrate`. You can use `kubeadm config print-default` to print the default
+configuration and `kubeadm config migrate` to convert your old configuratin files to a newer version.
+
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@@ -27,6 +31,12 @@ may use `kubeadm upgrade`.
 
 ## kubeadm config view {#cmd-config-view}
 {{< include "generated/kubeadm_config_view.md" >}}
+
+## kubeadm config print-default {#cmd-config-print-defaalt}
+{{< include "generated/kubeadm_config_print-default.md" >}}
+
+## kubeadm config migrate {#cmd-config-migrate}
+{{< include "generated/kubeadm_config_migrate.md" >}}
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