docs/libvirt: Add more hints about cleanup and reinstallation

The stale `auth` directory was what was breaking my cluster reinstalls. Let's encourage people to use `--dir`.
openshift · Oct 31, 2018 · 6fa6c57 · 6fa6c57
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commit 6fa6c57
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diff --git a/README.md b/README.md
@@ -55,3 +55,7 @@ Destroy the cluster and release associated resources with:
 ```sh
 openshift-install destroy cluster
 ```
+
+Note that you almost certainly also want to clean up the installer state files too, including `auth/`, `terraform.tfstate` etc.
+The best thing to do is always pass the `--dir` argument to `install` and `destroy`.
+And if you want to reinstall from scratch, `rm -rf` the asset directory beforehand.