document krb.conf tweak

src/etc/kerberosIV/README

@@ -1,5 +1,5 @@
 #	from @(#)README	8.1 (Berkeley) 6/9/93
-#	$OpenBSD: README,v 1.2 1996/06/02 05:08:51 tholo Exp $
+#	$OpenBSD: README,v 1.3 1998/01/03 01:46:07 deraadt Exp $
 
 Notes about the contents of the /etc/kerberosIV directory:
 
@@ -21,8 +21,10 @@ The principal.* files comprise the Kerberos database itself, and contain
 keys for all principles, and should not be world-readable.
 
 The krb.conf file contains the configuration for this machine:
-	- which realm I'm in
-	- which servers I should talk to for this realm
+1) which realm I'm in
+   if this line begins with '#', kerberos is disabled system-wide.
+2) which servers I should talk to for _this_ realm
+3) which servers I should talk to for the following realms.
 
 The krb.realms file contains the name of Kerberos servers for
 various (sub)domains.