add missing authentication styles.

initially intended for YubiKey, jmc@ noted that list was out of date.
ok deraadt@, jmc@

src/etc/login.conf.in

@@ -1,4 +1,4 @@
-# $OpenBSD: login.conf.in,v 1.5 2011/10/05 13:37:49 ajacoutot Exp $
+# $OpenBSD: login.conf.in,v 1.6 2012/02/06 21:25:13 sobrado Exp $
 
 #
 # Sample login.conf file.  See login.conf(5) for details.
@@ -15,11 +15,14 @@
 #		local password)
 # lchpass	Do not login; change user's local password instead
 # radius	Use radius authentication
+# reject	Use rejected authentication
 # skey		Use S/Key authentication
 # activ		ActivCard X9.9 token authentication
 # crypto	CRYPTOCard X9.9 token authentication
 # snk		Digital Pathways SecureNet Key authentication
+# tis		TIS Firewall Toolkit authentication
 # token		Generic X9.9 token authentication
+# yubikey	YubiKey authentication
 #
 
 # Default allowed authentication styles