move stats and inbound to features directory

common/stats/io.go

@@ -1,14 +1,14 @@
 package stats
 
 import (
-	"v2ray.com/core"
 	"v2ray.com/core/common"
 	"v2ray.com/core/common/buf"
+	"v2ray.com/core/features/stats"
 	"v2ray.com/core/transport/pipe"
 )
 
 type SizeStatWriter struct {
-	Counter core.StatCounter
+	Counter stats.Counter
 	Writer  buf.Writer
 }