Imports github.com/mholt/caddy github.com/miekg/coredns/core/dnsserver github.com/miekg/coredns/middleware github.com/miekg/coredns/singleflight github.com/miekg/dns github.com/patrickmn/go-cache github.com/prometheus/client_golang/prometheus golang.org/x/net/context Standard library imports crypto crypto/ecdsa crypto/rsa errors hash/fnv log os strconv strings time