Change CheckpointConfirmations to 4096.
Change CheckpointConfirmations to 4096.

This value fits the parameters for Decred better.

jrick/btcd,jcmincke/dcrd,jcmincke/dcrd,jrick/btcd,jrick/btcd,decred/dcrd,jcmincke/dcrd,jrick/dcrd,decred/dcrd,jrick/dcrd