Add a reference to the TR-064 spec

Author: Tod Beardsley

modules/exploits/linux/http/tr069_ntpserver_cmdinject.rb

@@ -31,7 +31,8 @@ def initialize(info = {})
         [
           [ 'EDB', '40740' ],
           [ 'URL', 'https://devicereversing.wordpress.com/2016/11/07/eirs-d1000-modem-is-wide-open-to-being-hacked/'],
-          [ 'URL', 'https://isc.sans.edu/forums/diary/Port+7547+SOAP+Remote+Code+Execution+Attack+Against+DSL+Modems/21759']
+          [ 'URL', 'https://isc.sans.edu/forums/diary/Port+7547+SOAP+Remote+Code+Execution+Attack+Against+DSL+Modems/21759'],
+          [ 'URL', 'https://broadband-forum.org/technical/download/TR-064.pdf']
         ],
       'DisclosureDate' => 'Nov 07 2016',
       'Privileged'     => true,