mention X11 README file

src/etc/root/root.mail

@@ -5,8 +5,9 @@ From: deraadt@do.not.reply (Theo de Raadt)
 To: root
 Subject: Welcome to OpenBSD 2.3
 
-This message will contain more information for system administrators who
-just installed OpenBSD.
+This message attempts to describe the most basic first questions that a
+system administrator of an OpenBSD box might have.  You are urged to
+save this message.
 
 For more information on how to setup your OpenBSD system, refer to the
 "afterboot" man page.  If you are not familiar with how to read man pages,
@@ -14,9 +15,13 @@ type "man man" at a shell prompt and read the entire thing.  The GNU "info"
 subsystem is also installed with further documentation resources; to read
 info pages type "info".
 
+If you have installed the X11 packages during the install process, you can
+find further information in the file /usr/X11R6/README.
+
 Binary packages of emacs 20.2, bash 2.01.1, tcsh--6.07.02, and pine-3.96
 are available on most architectures. The files are in the directory
 	ftp://ftp.openbsd.org/pub/OpenBSD/2.3/packages/
 or	CD2:/packages/   (ie. mount /dev/cd0a /mnt; cd /mnt/packages)
 Select your architecture and download the tarballs of your choice.  To
 install issue the command `pkg_add <pkg-name>' as root.
+