pkg_add and ftp(1) localized error messages

[Jérémie Courrèges-Anglas]

So pkg_add spits out errors when ftp outputs stuff like "Tube brisé"
instead of the english version "Broken pipe".  We need to override some
locale-related settings to get the english version.

This is a minimal effort diff to do this.  Maybe other LC_* variables
could be dealt with, or a Perl-only solution would be more flexible, not
sure.  Suggestions welcome.

Index: OpenBSD/PackageRepository.pm
===================================================================
RCS file: /cvs/src/usr.sbin/pkg_add/OpenBSD/PackageRepository.pm,v
retrieving revision 1.95
diff -u -p -r1.95 PackageRepository.pm
--- OpenBSD/PackageRepository.pm        28 Apr 2012 15:22:49 -0000      1.95
+++ OpenBSD/PackageRepository.pm        8 Dec 2013 12:03:39 -0000
@@ -595,7 +595,10 @@ sub grab_object
 {
        my ($self, $object) = @_;
        my ($ftp, @extra) = split(/\s+/, OpenBSD::Paths->ftp);
-       exec {$ftp}
+       my $env = OpenBSD::Paths->env;
+       exec {$env}
+           $env,
+           'LC_MESSAGES=C',
            $ftp,
            @extra,
            "-o",
Index: OpenBSD/Paths.pm
===================================================================
RCS file: /cvs/src/usr.sbin/pkg_add/OpenBSD/Paths.pm,v
retrieving revision 1.21
diff -u -p -r1.21 Paths.pm
--- OpenBSD/Paths.pm    16 Jan 2012 08:42:38 -0000      1.21
+++ OpenBSD/Paths.pm    8 Dec 2013 12:03:39 -0000
@@ -52,6 +52,7 @@ sub hostname() { '/bin/hostname' }
 sub sudo() { '/usr/bin/sudo' }
 sub du() { '/usr/bin/du' }
 sub diff() { '/usr/bin/diff' }
+sub env() { '/usr/bin/env' }
 
 # Various paths
 sub shells() { '/etc/shells' }