Replaces #6079.
When the internal miner is enabled at the start of a new node, there is an near instant assert in TestBlockValidity because its attempting to mine a block before the top checkpoint.
Also avoids a data race around vNodes.
When the internal miner is enabled at the start of a new node, there
is an near instant assert in TestBlockValidity because its attempting
to mine a block before the top checkpoint.
Also avoids a data race around vNodes.
Milestone
0.11.0