Imports
- github.com/mholt/caddy
- github.com/mholt/caddy/caddyfile
- github.com/miekg/coredns/core/dnsserver
- github.com/miekg/coredns/middleware
- github.com/miekg/coredns/middleware/pkg/dnsutil
- github.com/miekg/coredns/middleware/pkg/singleflight
- github.com/miekg/coredns/request
- github.com/miekg/dns
- github.com/prometheus/client_golang/prometheus
- golang.org/x/net/context