Update docs for user-guide

cluster/addons/fluentd-gcp/fluentd-gcp-image/README.md

 # Collecting Docker Log Files with Fluentd and sending to GCP.
 
-The image was moved to the the
+The image was moved to the
 [new location](https://github.com/kubernetes/contrib/tree/master/fluentd/fluentd-gcp-image).
 
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examples/volumes/azure_disk/README.md

@@ -7,7 +7,7 @@ In the pod, you need to provide the following information:
 - *diskName*:  (required) the name of the VHD blob object.
 - *diskURI*: (required) the URI of the vhd blob object.
 - *cachingMode*: (optional) disk caching mode. Must be one of None, ReadOnly, or ReadWrite. Default is None.
-- *fsType*:  (optional) the filesytem type to mount. Default is ext4.
+- *fsType*:  (optional) the filesystem type to mount. Default is ext4.
 - *readOnly*: (optional) whether the filesystem is used as readOnly. Default is false.
 
 

examples/volumes/nfs/README.md

@@ -85,7 +85,8 @@ Replace the invalid IP in the [nfs PV](nfs-pv.yaml). (In the future,
 we'll be able to tie these together using the service names, but for
 now, you have to hardcode the IP.)
 
-Create the the [persistent volume](https://kubernetes.io/docs/user-guide/persistent-volumes.md)
+Create the [persistent volume](https://kubernetes.io/docs/concepts/storage/persistent-volumes/)
+
 and the persistent volume claim for your NFS server. The persistent volume and
 claim gives us an indirection that allow multiple pods to refer to the NFS
 server using a symbolic name rather than the hardcoded server address.