Make copy's protected API backwards compatible to Ant 1.6.5 - PR 45701?

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@690264 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Copy.java

@@ -73,6 +73,8 @@ public class Copy extends Task {
     protected File destFile = null; // the destination file
     protected File destDir = null;  // the destination directory
     protected Vector rcs = new Vector();
+    // here to provide API backwards compatibility
+    protected Vector filesets = rcs;
 
     private boolean enableMultipleMappings = false;
     protected boolean filtering = false;