[c-nsp] GTSM IOS-XR

[Saku Ytti]

If  you are running GTSM in IOS-XR, it does not work. TTL is verified
during 3-way-sync, not after. So anyone can reset that session with
trivial amount of packets in subsecond.

Cisco is is having internal problems arguing if this is feature or
bug. If you are relying on GTSM on IOS-XR today, and this is problem
for you, I recommend talking to your account team or TAC to create bit
more internal pressure to help parties inside Cisco who want to get
this fixed.

This is day1 issue, it has never worked.

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  ++ytti