Small changes based on review comments

intel/entity.go

@@ -273,6 +273,8 @@ func (e *Entity) getDomainLists() {
 			domains = domainsToInspect
 		}
 
+		domains = makeDistinct(domains)
+
 		for _, d := range domains {
 			log.Tracef("intel: loading domain list for %s", d)
 			list, err := filterlists.LookupDomain(d)
@@ -441,3 +443,12 @@ func buildLookupMap(l []string) filterlists.LookupMap {
 
 	return m
 }
+
+func makeDistinct(slice []string) []string {
+	lm := buildLookupMap(slice)
+	result := make([]string, 0, len(lm))
+	for key := range lm {
+		result = append(result, key)
+	}
+	return result
+}

nameserver/nameserver.go

@@ -2,6 +2,7 @@ package nameserver
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net"
 	"strings"
@@ -247,7 +248,7 @@ func handleRequest(ctx context.Context, w dns.ResponseWriter, query *dns.Msg) er
 		// TODO: analyze nxdomain requests, malware could be trying DGA-domains
 		tracer.Warningf("nameserver: %s requested %s%s: %s", conn.Process(), q.FQDN, q.QType, err)
 
-		if _, ok := err.(*resolver.BlockedUpstreamError); ok {
+		if errors.Is(err, &resolver.BlockedUpstreamError{}) {
 			conn.Block(err.Error())
 		} else {
 			conn.Failed("failed to resolve: " + err.Error())

profile/config.go

@@ -192,6 +192,7 @@ Examples:
 		ExternalOptType: "security level",
 		DefaultValue:    status.SecurityLevelsAll,
 		ValidationRegex: "^(7|6|4)$",
+		ExpertiseLevel:  config.ExpertiseLevelExpert,
 	})
 	if err != nil {
 		return err