binding to specific interface is non-functional

Index: main.go
--- main.go.orig
+++ main.go
@@ -124,10 +124,6 @@ func main() {
 				Name:  defs.OptionSource,
 				Usage: "`SOURCE` IP address to bind to",
 			},
-			&cli.StringFlag{
-				Name:  defs.OptionInterface,
-				Usage: "network INTERFACE to bind to",
-			},
 			&cli.IntFlag{
 				Name:  defs.OptionTimeout,
 				Usage: "HTTP `TIMEOUT` in seconds.",
