Make delete actually stop resources by default.

Refactor for shared code.

docs/man/man1/kubectl-delete.1

@@ -33,6 +33,10 @@ will be lost along with the rest of the resource.
 \fB\-\-all\fP=false
     [\-all] to select all the specified resources
 
+.PP
+\fB\-\-cascade\fP=true
+    If true, cascade the delete resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.
+
 .PP
 \fB\-f\fP, \fB\-\-filename\fP=[]
     Filename, directory, or URL to a file containing the resource to delete