Fix the path for Perl

Patch from Debian (20_fix-perl-path.patch)
Description: fix the path for Perl.
 See Debian Policy '10.4 Scripts'.
Author: Joao Eriberto Mota Filho <[email protected]>
Last-Update: 2018-11-20

Author: eribertomota

scripts/txt2html

@@ -1,4 +1,4 @@
-#!/usr/bin/env perl
+#!/usr/bin/perl
 use 5.006_001;
 use strict;
 ##---------------------------------------------------------------------------##
@@ -793,6 +793,7 @@ based on txt2html by Seth Golub
 Original txt2html script copyright (c) 1994-2000 Seth Golub seth AT aigeek.com
 
 Copyright (c) 2002-2005 Kathryn Andersen
+Copyright (c) 2018      Joao Eriberto Mota Filho
 
 This program is free software; you can redistribute it and/or
 modify it under the same terms as Perl itself.