add test

Author: devnexen

ext/ftp/tests/gh20601.phpt

@@ -0,0 +1,14 @@
+--TEST--
+GH-20601 (ftp_connect timeout overflow)
+--EXTENSIONS--
+ftp
+--FILE--
+<?php
+try {
+	ftp_connect('127.0.0.1', 1024, PHP_INT_MAX);
+} catch (\ValueError $e) {
+	echo $e->getMessage();
+}
+?>
+--EXPECT--
+timeout value overflow