organize host/upnp.go functions alphabetically
organize host/upnp.go functions alphabetically

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