Minor update to add help details for e2e command

cmd/e2e/e2e.go

@@ -44,9 +44,9 @@ func init() {
 	flag.StringVar(&context.KubeContext, clientcmd.FlagContext, "", "kubeconfig context to use/override. If unset, will use value from 'current-context'")
 	flag.StringVar(&context.AuthConfig, "auth_config", "", "Path to the auth info file.")
 	flag.StringVar(&context.CertDir, "cert_dir", "", "Path to the directory containing the certs. Default is empty, which doesn't use certs.")
-	flag.StringVar(&context.Host, "host", "", "The host to connect to")
+	flag.StringVar(&context.Host, "host", "", "The host, or apiserver, to connect to")
 	flag.StringVar(&context.RepoRoot, "repo_root", "./", "Root directory of kubernetes repository, for finding test files. Default assumes working directory is repository root")
-	flag.StringVar(&context.Provider, "provider", "", "The name of the Kubernetes provider")
+	flag.StringVar(&context.Provider, "provider", "", "The name of the Kubernetes provider (gce, gke, local, vagrant, etc.)")
 	flag.StringVar(&gceConfig.MasterName, "kube_master", "", "Name of the kubernetes master. Only required if provider is gce or gke")
 	flag.StringVar(&gceConfig.ProjectID, "gce_project", "", "The GCE project being used, if applicable")
 	flag.StringVar(&gceConfig.Zone, "gce_zone", "", "GCE zone being used, if applicable")