A+C: add Benoit Sigoure (individual CLA)

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/164410043
diff --git a/AUTHORS b/AUTHORS
index cea02ac..48a262b 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -65,6 +65,7 @@
 Ben Olive <sionide21@gmail.com>
 Benjamin Black <b@b3k.us>
 Benny Siegert <bsiegert@gmail.com>
+Benoit Sigoure <tsunanet@gmail.com>
 Berengar Lehr <berengar.lehr@gmx.de>
 Billie Harold Cleek <bhcleek@gmail.com>
 Bjorn Tillenius <bjorn@tillenius.me>