Merge branch 'master' of https://github.com/kubernetes/kubernetes.github.io into release-1.7

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  info about cron jobs updated (#4110)
  fix example in configure-pod-configmap.md
  Remove extraneous files from autogeneration of ref pages. (#4044)
  Add notes for file/flag precedence
  Removed "networked" from PersistentVolume (PV) definition. (#4121)
  Fix syntax err in example

docs/tasks/configure-pod-container/configure-pod-configmap.md

@@ -248,7 +248,7 @@ spec:
   containers:
     - name: test-container
       image: gcr.io/google_containers/busybox
-      command: [ "/bin/sh","-c","cat /etc/config/keys/special.level" ]
+      command: [ "/bin/sh","-c","cat /etc/config/keys" ]
       volumeMounts:
       - name: config-volume
         mountPath: /etc/config
@@ -258,11 +258,11 @@ spec:
         name: special-config
         items:
         - key: special.level
-          path: /keys
+          path: keys
   restartPolicy: Never
 ```
 
-When the pod runs, the command (`"cat /etc/config/keys/special.level"`) produces the output below:
+When the pod runs, the command (`"cat /etc/config/keys"`) produces the output below:
 
 ```shell
 very