From: Dominic Hargreaves <dom@earth.li>
Subject: Use Text::ParseWords instead of shellwords.pl

The shellwords.pl library is deprecated and will be removed in a future
version of perl. Text::ParseWords has been in core since 5.0.0 and it is
used by shellwords.pl already.

Adapted from <https://github.com/markstos/CGI.pm/commit/0cf175dbfbeaa46d71343412c715096da5bd0eaf>

--- a/lib/CGI/Simple.pm
+++ b/lib/CGI/Simple.pm
@@ -1189,10 +1189,10 @@
     @words = @ARGV;
   }
   elsif ( $_[0]->{'.globals'}->{'DEBUG'} == 2 ) {
-    require "shellwords.pl";
+    require Text::ParseWords;
     print "(offline mode: enter name=value pairs on standard input)\n";
     chomp( my @lines = <STDIN> );
-    @words = &shellwords( join " ", @lines );
+    @words = &Text::ParseWords::old_shellwords( join " ", @lines );
   }
   else {
     return '';