[4.0] a870df8 Add attribution

[Martin Blix Grydeland]

commit a870df8d69e1bb95c2a8f733f7c6f4a3fd7f1e8b
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Tue Feb 25 15:53:48 2014 +0100

    Add attribution

diff --git a/bin/varnishhist/varnishhist.c b/bin/varnishhist/varnishhist.c
index 51c87ec..3bc1a3a 100644
--- a/bin/varnishhist/varnishhist.c
+++ b/bin/varnishhist/varnishhist.c
@@ -5,6 +5,7 @@
  *
  * Author: Poul-Henning Kamp <phk at phk.freebsd.dk>
  * Author: Dag-Erling Smørgrav <des at des.no>
+ * Author: Guillaume Quintard <guillaume.quintard at gmail.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions