Make Create-By attribute in manifest compliant with spec by listing

the java implementation version and vendor. Add an Ant-Version field to
show the Ant version

PR:	12219


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273926 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/defaultManifest.mf

@@ -1,3 +1,3 @@
 Manifest-Version: 1.0
-Created-By: Apache Ant @VERSION@
+Ant-Version: Apache Ant @VERSION@ 
 

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

@@ -1,7 +1,7 @@
 /*
  * The Apache Software License, Version 1.1
  *
- * Copyright (c) 2001-2002 The Apache Software Foundation.  All rights
+ * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -729,7 +729,13 @@ public class Manifest {
                     + defManifest);
             }
             try {
-                return new Manifest(new InputStreamReader(in, "ASCII"));
+                Manifest defaultManifest 
+                    = new Manifest(new InputStreamReader(in, "ASCII"));
+                Attribute createdBy = new Attribute("Created-By", 
+                    System.getProperty("java.vm.version") + " ("
+                    + System.getProperty("java.vm.vendor") + ")" );
+                defaultManifest.getMainSection().storeAttribute(createdBy);
+                return defaultManifest;
             } catch (UnsupportedEncodingException e) {
                 return new Manifest(new InputStreamReader(in));
             }