clarify usage message

diff --git a/fyvzl b/fyvzl
index dc184d76a5587e04f55869643139a74db26bb33f..c5dbfe498874e928155fcd3ab1fe3e2ad9419374 100755 (executable)
--- a/fyvzl
+++ b/fyvzl
@@ -16,7 +16,7 @@ actions
   show LOCAL-PART
   list
   list-actions
-empty value for REDIRECT means reject
+empty string for REDIRECT means reject
 END
 our $usage3 = <<'END';
 privileged actions