remove quick-shutdown code surrounding peer handshake
remove quick-shutdown code surrounding peer handshake

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