added testing mode

bmotd.sh

@@ -62,6 +62,11 @@ main () {
       update
       exit 0
       ;;
+    test)
+      MOTD="/dev/stdout"
+      update
+      exit 0
+      ;;
     *)
       printHelp
   esac
@@ -105,7 +110,7 @@ update() {
 }
 
 function printHelp {
-  printf "./$0 update | disable | enable"
+  printf "./$0 test | update | disable | enable"
   exit 0;
 }