allow "yes" and "no" for booleans in host config
allow "yes" and "no" for booleans in host config

Fixes #1383

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