Adjust IsInitialBlockDownload() to not be as based on headers. Sync from 3 peers.
Adjust IsInitialBlockDownload() to not be as based on headers. Sync from 3 peers.

Crowndev/crowncoin,Crowndev/crowncoin,Crowndev/crowncoin,Crowndev/crowncoin,Crowndev/crowncoin,Crowndev/crowncoin