fix date spec in mbox From line

From: Matthias Kilian <kili@outback.escape.de>

src/etc/root/root.mail

@@ -1,4 +1,4 @@
-From deraadt@do-not-reply.openbsd.org Sat Nov 1 11:48:48 MST 2005
+From deraadt@do-not-reply.openbsd.org Sat Nov  1 11:48:48 MST 2005
 Return-Path: root
 Date: Nov 1 11:48:48 MST 2005
 From: deraadt@do-not-reply.openbsd.org (Theo de Raadt)