Disable telnet in favor of passwordless SSH

This enables passworldless login for root via SSH whenever no root
password is set (e.g. after reset, flashing without keeping config
or in failsafe) and removes telnet support alltogether.

Signed-off-by: Steven Barth <steven@midlink.org>

SVN-Revision: 46809

package/base-files/files/lib/preinit/99_10_failsafe_login

@@ -1,9 +1,10 @@
 #!/bin/sh
-# Copyright (C) 2006 OpenWrt.org
+# Copyright (C) 2006-2015 OpenWrt.org
 # Copyright (C) 2010 Vertical Communications
 
 failsafe_netlogin () {
-	telnetd -l /bin/login.sh <> /dev/null 2>&1
+	dropbearkey -t rsa -s 1024 -f /tmp/dropbear_failsafe_host_key
+	dropbear -r /tmp/dropbear_failsafe_host_key <> /dev/null 2>&1
 }
 
 failsafe_shell() {