rook: update documentation

rook.md

@@ -1,4 +1,4 @@
-##
+## v1: original rook manifests
 
 ```
  git clone https://github.com/rook/rook.git
@@ -10,3 +10,20 @@ kubectl apply -f cluster.yaml
 kubectl apply -f csi/rbd/storageclass.yaml
 kubectl apply -f toolbox.yaml
 ```
+
+## v2 with included manifests
+
+* Patched for IPv6 support
+* Including RBD
+
+```
+for yaml in crds common operator cluster storageclass toolbox; do
+    kubectl apply -f ${yaml}.yaml
+done
+```
+
+## Debugging / ceph toolbox
+
+```
+kubectl -n rook-ceph exec -it deploy/rook-ceph-tools -- bash
+```