Make Changes to Support FTPS AntTaskDef that extends FTP but uses FTPSClient.

src/main/org/apache/tools/ant/taskdefs/optional/net/FTP.java

@@ -2488,6 +2488,10 @@ public class FTP extends Task implements FTPTaskConfig {
         return result;
     }
 
+    protected FTPClient getFTPClient(){
+        return new FTPClient();
+    }
+
     /**
      * Runs the task.
      *
@@ -2503,7 +2507,7 @@ public class FTP extends Task implements FTPTaskConfig {
         try {
             log("Opening FTP connection to " + server, Project.MSG_VERBOSE);
 
-            ftp = new FTPClient();
+            ftp = getFTPClient();
             if (this.isConfigurationSet) {
                 ftp = FTPConfigurator.configure(ftp, this);
             }

src/main/org/apache/tools/ant/taskdefs/optional/net/FTPS.java

@@ -0,0 +1,43 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.apache.tools.ant.taskdefs.optional.net;
+
+import org.apache.commons.net.ftp.FTPClient;
+import org.apache.commons.net.ftp.FTPSClient;
+
+/**
+ * Basic FTPS client. Performs the following actions:
+ * <ul>
+ *   <li><strong>send</strong> - send files to a remote server. This is the
+ *   default action.</li>
+ *   <li><strong>get</strong> - retrieve files from a remote server.</li>
+ *   <li><strong>del</strong> - delete files from a remote server.</li>
+ *   <li><strong>list</strong> - create a file listing.</li>
+ *   <li><strong>chmod</strong> - change unix file permissions.</li>
+ *   <li><strong>rmdir</strong> - remove directories, if empty, from a
+ *   remote server.</li>
+ * </ul>
+ * This class is an extention of FTP class that supports FTPS Client for FTPS taskdef.
+ *
+ */
+public class FTPS extends FTP {
+    @Override
+    protected FTPClient getFTPClient(){
+        return new FTPSClient();
+    }
+}