Fix #426

Added refuseany (enabled by default)
Added ratelimit and refuseany to the config file (for manual editing only)

coredns.go

@@ -9,6 +9,7 @@ import (
 
 	_ "github.com/AdguardTeam/AdGuardHome/coredns_plugin"
 	_ "github.com/AdguardTeam/AdGuardHome/coredns_plugin/ratelimit"
+	_ "github.com/AdguardTeam/AdGuardHome/coredns_plugin/refuseany"
 	_ "github.com/AdguardTeam/AdGuardHome/upstream"
 	"github.com/coredns/coredns/core/dnsserver"
 	"github.com/coredns/coredns/coremain"
@@ -65,6 +66,7 @@ var directives = []string{
 	"prometheus",
 	"errors",
 	"log",
+	"refuseany",
 	"ratelimit",
 	"dnsfilter",
 	"dnstap",