A+C: fix email address

R=adg
CC=golang-dev
https://golang.org/cl/1856052
diff --git a/AUTHORS b/AUTHORS
index 57ac099..e894c2c 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -24,7 +24,7 @@
 Ben Olive <sionide21@gmail.com>
 Charles L. Dorian <cldorian@gmail.com>
 Chris Lennert <calennert@gmail.com>
-Christian Himpel <chressie@gmail.com>
+Christian Himpel <chressie@googlemail.com>
 Christopher Wedgwood <cw@f00f.org>
 Conrad Meyer <cemeyer@cs.washington.edu>
 Daniel Fleischman <danielfleischman@gmail.com>