Move docs/services-firewalls.md into docs/user-guide/ and make small

wording changes to api.md

pkg/kubectl/cmd/create.go

@@ -127,7 +127,7 @@ func printObjectSpecificMessage(obj runtime.Object, out io.Writer) {
 cluster.  If you want to expose this service to the external internet, you may
 need to set up firewall rules for the service port(s) (%s) to serve traffic.
 
-See http://releases.k8s.io/HEAD/docs/services-firewalls.md for more details.
+See http://releases.k8s.io/HEAD/docs/user-guide/services-firewalls.md for more details.
 `,
 				makePortsString(obj.Spec.Ports, true))
 			out.Write([]byte(msg))