Added the AD review comment from Ted Lemon in Section 7.

OLD:
     used in cellular hosts.  However, it should be noted that in the
      3GPP model, the network would assign a new prefix, in most cases,
      to hosts in roaming situations and typically, also when the
      cellular hosts activate a PDP Context or a PDN Connection.  This
      means that 3GPP networks will already provide a limited form of
      addressing privacy, and no global tracking of a single host is
      possible through its address.  On the other hand, since a GGSN/

NEW:
      used in cellular hosts.  However, it should be noted that in the
      3GPP model, the network would assign a new prefix, in most cases,
      to hosts in roaming situations and typically, also when the
      cellular hosts activate a PDP Context or a PDN Connection. 3GPP
      devices must not use interface identifiers that are unique to the
      device, so the only difference in address between to 3GPP devices
      using SLAAC is in the prefix.  This means that 3GPP networks will
      already provide a limited form of addressing privacy, and no
      global tracking of a single host is possible through its address.
      On the other hand, since a GGSN/PGW's coverage area is expected to

Added the AD review comment from Brian Haberman in Section 2.5.

OLD:
   Consequently, sending MLD reports for link-local addresses in a 3GPP
   environment is not necessary, although sending those cause no harm or
   interoperability issues.

   MLD is needed for multicast group knowledge that is not link-local.

NEW:
   Consequently, sending MLD reports for link-local addresses in a 3GPP
   environment is not necessary, although sending those cause no harm or
   interoperability issues.  Refer Section 5.10 of [RFC6434] for MLD
   usage for multicast group knowledge that is not link-local.

Signed-off-by: Jouni Korhonen <jouni.korhonen@renesasmobile.com>