Add license information, change shebang.HEADv0.1master

1 files changed, 4 insertions, 1 deletions

diff --git a/rf b/rf
index bb9343c..c1d8d56 100755
--- a/rf
+++ b/rf
@@ -1,4 +1,7 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
+
+# Permission to use, copy, modify and/or distribute this software
+# for any purpose with or without fee is hereby granted.
 
 use v5.12;
 use warnings;