Improve cert get command

cmd/dbg/main.go

@@ -71,15 +71,22 @@ func main() {
 	}
 	backendsCmd.AddCommand(backendsGetCmd)
 
+	certCmd := &cobra.Command{
+		Use:   "certs",
+		Short: "Inspect dynamic SSL certificates",
+	}
+
 	certGetCmd := &cobra.Command{
-		Use:   "get-cert",
-		Short: "Output the SSL certificate for the given hostname",
+		Use:   "get [hostname]",
+		Short: "Get the dynamically-loaded certificate information for the given hostname",
 		Args:  cobra.ExactArgs(1),
 		Run: func(cmd *cobra.Command, args []string) {
 			certGet(args[0])
 		},
 	}
-	rootCmd.AddCommand(certGetCmd)
+	certCmd.AddCommand(certGetCmd)
+
+	rootCmd.AddCommand(certCmd)
 
 	generalCmd := &cobra.Command{
 		Use:   "general",