Allow '-n none' for the dind to set up no network plugin
Allow '-n none' for the dind to set up no network plugin

In order to diagnose some problems when there was no network plugin enabled, it was necessary to set up a DinD environment with no network plugin.

Once this is enabled you can do:
  hack/dind-cluster.sh start -n "none" -N 1

I used -N 1 above to set up a single node (since no networking between nodes will work anyway).

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