Better error handling in goroutines (#122)

* More robust goroutine error handling using channels

* Fix tests and make startup log msg saner

* Clarification to README and config file

util.go

@@ -10,7 +10,6 @@ import (
 	"strings"
 
 	"github.com/BurntSushi/toml"
-	"github.com/miekg/dns"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -108,14 +107,6 @@ func setupLogging(format string, level string) {
 	// TODO: file logging
 }
 
-func startDNS(listen string, proto string) *dns.Server {
-	// DNS server part
-	dns.HandleFunc(".", handleRequest)
-	server := &dns.Server{Addr: listen, Net: proto}
-	go server.ListenAndServe()
-	return server
-}
-
 func getIPListFromHeader(header string) []string {
 	iplist := []string{}
 	for _, v := range strings.Split(header, ",") {