Fix clash tracker timeout

constant/timeout.go

@@ -4,7 +4,7 @@ import "time"
 
 const (
 	TCPTimeout             = 5 * time.Second
-	TCPKeepAlivePeriod     = 20 * time.Second
+	TCPKeepAlivePeriod     = 30 * time.Second
 	ReadPayloadTimeout     = 300 * time.Millisecond
 	URLTestTimeout         = TCPTimeout
 	DefaultURLTestInterval = 1 * time.Minute