The --ports flag does not modify dc env variables

--ports is not intended to modify the env variables. That can
be done using oc env or by editing the router's dc. Rather it
sets the ports that are exposed in the router's service.

The help message is confusing and misleading.  This change
rewords the help text.

bug 1420543
https://bugzilla.redhat.com/show_bug.cgi?id=1420543

pkg/cmd/admin/router/router.go

@@ -281,7 +281,7 @@ func NewCmdRouter(f *clientcmd.Factory, parentName, name string, out, errout io.
 	cmd.Flags().StringVar(&cfg.ForceSubdomain, "force-subdomain", "", "A router path format to force on all routes used by this router (will ignore the route host value)")
 	cmd.Flags().StringVar(&cfg.ImageTemplate.Format, "images", cfg.ImageTemplate.Format, "The image to base this router on - ${component} will be replaced with --type")
 	cmd.Flags().BoolVar(&cfg.ImageTemplate.Latest, "latest-images", cfg.ImageTemplate.Latest, "If true, attempt to use the latest images for the router instead of the latest release.")
-	cmd.Flags().StringVar(&cfg.Ports, "ports", cfg.Ports, "A comma delimited list of ports or port pairs to expose on the router pod. The default is set for HAProxy. Port pairs are applied to the service and to host ports (if specified).")
+	cmd.Flags().StringVar(&cfg.Ports, "ports", cfg.Ports, "A comma delimited list of ports or port pairs that set the port in the router pod containerPort and hostPort. It also sets service port and targetPort to expose on the router pod. This does not modify the env variables. That can be done using oc env or by editing the router's dc. This is used when host-network=false.")
 	cmd.Flags().StringVar(&cfg.RouterCanonicalHostname, "router-canonical-hostname", cfg.RouterCanonicalHostname, "CanonicalHostname is the external host name for the router that can be used as a CNAME for the host requested for this route. This value is optional and may not be set in all cases.")
 	cmd.Flags().Int32Var(&cfg.Replicas, "replicas", cfg.Replicas, "The replication factor of the router; commonly 2 when high availability is desired.")
 	cmd.Flags().StringVar(&cfg.Labels, "labels", cfg.Labels, "A set of labels to uniquely identify the router and its components.")