Use broadcast for bool aggregates, fixes bottleneck on large numbers of keys.
Use broadcast for bool aggregates, fixes bottleneck on large numbers of keys.

shaunstanislaus/curiodb,bussiere/curiodb,SteamShon/curiodb,scorpiovn/curiodb,egisj/curiodb,stephenmcd/curiodb,shichaoyuan/curiodb,Hawstein/curiodb