This patch includes support for the Intra-Site Automatic Tunnel
Addressing Protocol (ISATAP) per RFC4214.

The following diffs are specific to the iproute2-2.6.23
software distribution. This message includes the full and
patchable diff text; please use this version to apply patches.
Signed-off-by: Fred L. Templin <fred.l.templin@boeing.com>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>