Close host connections after all command have been run, added some flags to version subcommand

cmd/version.go

@@ -11,15 +11,21 @@ const versionStr = "0.2.4"
 
 var (
 	versionCmd = &cobra.Command{
-		Use:   "version",
+		Use:   "version [flags]",
 		Short: "Prints the version and exits.",
 		Run:   version,
 	}
+	numOnly bool
 )
 
 func version(cmd *cobra.Command, args []string) {
 
-	fmt.Printf("%s\n", versionStr)
+	cmd.PersistentFlags().BoolVarP(&numOnly, "num", "n", true, "Output the version number only.")
+	if numOnly {
+		fmt.Printf("%s\n", versionStr)
+	} else {
+		fmt.Printf("Version: %s", versionStr)
+	}
 
 	os.Exit(0)
 }