Added the stub parserbuilder work as well.

listener.go

@@ -67,11 +67,11 @@ func (listener Listener) Accept() (net.Conn, error) {
 	// 	logger.Printf("Not trusted connection")
 	// }
 
-	// NOTE strictly a proxy protocol implementation without plain connections
+	// NOTE supports all the parserbuilders out of the box
 	headerParser := NewFallbackHeaderParserBuilder(
 		TextHeaderParserBuilder,
 		BinaryHeaderParserBuilder,
-		// StubHeaderParserBuilder,
+		StubHeaderParserBuilder,
 	).Build(logger)
 
 	return NewConn(rawConn, headerParser), nil