clarify erasure codes
clarify erasure codes

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