Replace all #!/usr/bin/perl with #!/usr/bin/env perl

As suggested in #9057.

1 files changed, 2 insertions, 1 deletions

diff --git a/boot b/boot
index 676f434bdb..8977eaf9a3 100755
--- a/boot
+++ b/boot
@@ -1,5 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 
+use warnings;
 use strict;
 
 use Cwd;