Tor Arntsen fixed how this is invoked

tests/testcurl.pl

-#!/usr/bin/env perl -w
+#!/usr/bin/env perl
 #***************************************************************************
 #                                  _   _ ____  _
 #  Project                     ___| | | |  _ \| |
@@ -46,6 +46,9 @@ use strict;
 
 use Cwd;
 
+# Turn on warnings (equivalent to -w, which can't be used with /usr/bin/env)
+BEGIN { $^W = 1; }
+
 use vars qw($version $fixed $infixed $CURLDIR $CVS $pwd $build $buildlog $buildlogname $gnulikebuild);
 use vars qw($name $email $desc $confopts);