Merge pull request #83 in DNS/adguard-dns from avg_time_fix to master

* commit '1ed9faa0c22c1ae9ec2043c80e697133688cea40':
  Fix API returning wrong average request time

coredns_plugin/coredns_stats.go

@@ -242,6 +242,14 @@ func handleStats(w http.ResponseWriter, r *http.Request) {
 		}
 		summed[key] = summedValue
 	}
+	// don't forget to divide by number of elements in returned slice
+	if val, ok := summed["avg_processing_time"]; ok {
+		if flval, flok := val.(float64); flok {
+			flval /= float64(len(histrical))
+			summed["avg_processing_time"] = flval
+		}
+	}
+
 	summed["stats_period"] = "24 hours"
 
 	json, err := json.Marshal(summed)