Add disclosure date and some explanation about it

modules/auxiliary/scanner/http/dlink_user_agent_backdoor.rb

@@ -17,23 +17,26 @@ class Metasploit3 < Msf::Auxiliary
 
   def initialize
     super(
-      'Name'        => 'DLink User-Agent Backdoor Scanner',
-      'Description' => %q{
+      'Name'           => 'DLink User-Agent Backdoor Scanner',
+      'Description'    => %q{
         This module attempts to find DLink devices running Alphanetworks web interfaces affected
         by the backdoor found on the User-Agent header. This module has been tested successfully
         on a DIR-100 device with firmware version v1.13.
       },
-      'Author'      =>
+      'Author'         =>
         [
           'Craig Heffner', # vulnerability discovery
           'Michael Messner <devnull[at]s3cur1ty.de>', # Metasploit module
           'juan vazquez' # minor help with msf module
         ],
-      'License'     => MSF_LICENSE,
-      'References'  =>
+      'License'        => MSF_LICENSE,
+      'References'     =>
         [
           [ 'URL', 'http://www.devttys0.com/2013/10/reverse-engineering-a-d-link-backdoor/' ]
         ],
+      # First documented in detail by Craig, but looks like it's been known
+      # (at least to the Russians :-) ) since 2010 - see post at forum.codenet.ru
+      'DisclosureDate' => "Oct 12 2013"
     )
 
   end