add osvdb ref

modules/exploits/windows/ssh/sysax_ssh_username.rb

@@ -30,6 +30,7 @@ class Metasploit3 < Msf::Exploit::Remote
 				],
 			'References'     =>
 				[
+					['OSVDB', '79689'],
 					['URL', 'http://www.pwnag3.com/2012/02/sysax-multi-server-ssh-username-exploit.html'],
 					['URL', 'http://www.exploit-db.com/exploits/18535/']
 				],
@@ -150,4 +151,4 @@ Todo: We seriously need a MSF SSH mixin to handle the SSH protocol ourselves, no
 relying on net/ssh.
 
 * Need a reliable stack pivot to rop out, haven't found one
-=end
+=end