Imports
- github.com/coredns/coredns/core/dnsserver
- github.com/coredns/coredns/plugin
- github.com/coredns/coredns/plugin/pkg/trace
- github.com/mholt/caddy
- github.com/miekg/dns
- github.com/opentracing/opentracing-go
- github.com/openzipkin/zipkin-go-opentracing
- golang.org/x/net/context