Add support of EventDomainFronting event

stats/stream_info.go

@@ -2,15 +2,20 @@ package stats
 
 import statsd "github.com/smira/go-statsd"
 
-type streamInfo map[string]string
-
-func (s streamInfo) T(key string) statsd.Tag {
-	return statsd.StringTag(key, s[key])
+type streamInfo struct {
+	isDomainFronted bool
+	tags            map[string]string
 }
 
-func (s streamInfo) Reset() {
-	for k := range s {
-		delete(s, k)
+func (s streamInfo) T(key string) statsd.Tag {
+	return statsd.StringTag(key, s.tags[key])
+}
+
+func (s *streamInfo) Reset() {
+	s.isDomainFronted = false
+
+	for k := range s.tags {
+		delete(s.tags, k)
 	}
 }