bugfix: better parsing of client IP for query log

internal/dnsHandler.go

@@ -20,10 +20,11 @@ func (dm *DomainManager) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	start := time.Now()
 	q := r.Question[0]
 	responseMessage := new(dns.Msg)
+
 	ql := QueryLog{
 		Started:  start.UTC(),
 		Protocol: w.RemoteAddr().Network(),
-		ClientIP: strings.Split(w.RemoteAddr().String(), ":")[0],
+		ClientIP: w.RemoteAddr().String()[:strings.LastIndex(w.RemoteAddr().String(), ":")],
 		Domain:   q.Name,
 		Status:   NoAnswer,
 	}