handleErrInvalidConsensusChangeID -> newHandle...
handleErrInvalidConsensusChangeID -> newHandle...

The name change is to enforce that the handler is only to be called from
the function miner.New

mharkus/Sia,Mingling94/Sia,mharkus/Sia,ChrisSchinnerl/Sia,ChrisSchinnerl/Sia,ericflo/Sia,mtlynch/Sia,ericflo/Sia,mnsl/Sia,MrStrong/Sia,rivine/rivine,johnathanhowell/Sia,NebulousLabs/Sia,rivine/rivine,MrStrong/Sia,mtlynch/Sia,NebulousLabs/Sia,mnsl/Sia