[c-nsp] SVD disabled by default on XR4.3.x

[Adam Vitkovsky]

Hi folks, Xander,
Why is the SVD disabled by default on 4.3.x what is the benefit of pushing
all the mac addresses, prefixes and labels for all the VRFs to all the LCs
please? 

Alrigh I understand that you get like 4M of FIB entries on Typhoon LCs so
the question is who cares right? 
But still I'd like to know the true reasoning behind it, might the SVD be
causing some issues in some circumstances please. 
Thank you.


adam