Don't log errNodeExists errors when adding bootstrap nodes
Don't log errNodeExists errors when adding bootstrap nodes

rivine/rivine,mtlynch/Sia,ChrisSchinnerl/Sia,ericflo/Sia,mharkus/Sia,NebulousLabs/Sia,mnsl/Sia,mtlynch/Sia,MrStrong/Sia,ericflo/Sia,rivine/rivine,mnsl/Sia,mharkus/Sia,NebulousLabs/Sia,MrStrong/Sia,ChrisSchinnerl/Sia