Handle reorg in stakedb by rewinding if connecting a block at or below current db height.
Handle reorg in stakedb by rewinding if connecting a block at or below current db height.

RogueElement/dcrdata,RogueElement/dcrdata,RogueElement/dcrdata,dcrdata/dcrdata,RogueElement/dcrdata,dcrdata/dcrdata,dcrdata/dcrdata,dcrdata/dcrdata,dcrdata/dcrdata