Edits to Teredo Security concerns

[Suresh Krishnan <suresh.krishnan@ericsson.com>]

Hi Remi/James/Christian/Jordi/Fred,
  From what I understood from your comments about the teredo security 
concerns draft, these are the issues you raised

  * Teredo should not be recommended for use in a managed network.
  Action: I will add some text to strongly caution against the use of 
Teredo in a managed network.

  * It is easy to identify and filter Teredo packets
  Action: I will replace section 3 with a simple way of identifying and 
filtering Teredo as follows
     Inbound traffic
     ===============
     src_port==3544 identifies Teredo packets

     Outbound traffic
     ================
     dest_port==3544 identifies Teredo packets


Am I missing any issues? Are the suggested actions acceptable to you? I 
will try to make these edits before the Jul 9 .

Cheers
Suresh