.mailmap maintenance after pulling from git-svn

Signed-off-by: Junio C Hamano <junkio@cox.net>

.mailmap

@@ -27,6 +27,7 @@ Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
 Ramsay Allan Jones <ramsay@ramsay1.demon.co.uk>
 René Scharfe <rene.scharfe@lsrfire.ath.cx>
 Robert Fitzsimons <robfitz@273k.net>
+Sam Vilain <sam@vilain.net>
 Santi Béjar <sbejar@gmail.com>
 Sean Estabrooks <seanlkml@sympatico.ca>
 Shawn O. Pearce <spearce@spearce.org>