move ReadHosts out of the lock
move ReadHosts out of the lock

miekg/coredns,johnbelamaric/coredns,jremond/coredns,ii/coredns,yongtang/coredns,johnbelamaric/coredns,ii/coredns,coredns/coredns,jremond/coredns,chrisohaver/coredns,miekg/coredns