Fix spelling error, closed PR/1557; dim@xs4all.nl

src/etc/root/root.mail

@@ -273,7 +273,7 @@ or alternatively install them via FTP thus
   # pkg_add -v ftp://ftp.openbsd.org/pub/OpenBSD/2.8/packages/i386/emacs-20.3.tgz
 
 You are STRONGLY urged to use ssh instead of telnet, rlogin, or rsh!  ssh is
-included in all OpenBSD systems.  The implimentation is OpenSSH, which we are
+included in all OpenBSD systems.  The implementation is OpenSSH, which we are
 the developers of.  Version 2.3.0 is included, and has support for both SSH1
 and SSH2 protocols.  For more information, see
 	http://www.OpenSSH.com