feat: Support VLESS XTLS Vision (#406)

common/buf/sing.go

@@ -5,9 +5,15 @@ import (
 	"github.com/sagernet/sing/common/buf"
 )
 
+const BufferSize = buf.BufferSize
+
 type Buffer = buf.Buffer
 
+var New = buf.New
+var StackNew = buf.StackNew
 var StackNewSize = buf.StackNewSize
+var With = buf.With
+
 var KeepAlive = common.KeepAlive
 
 //go:norace