deprecate util classes used only by installer

core/java/src/net/i2p/util/Copy.java

@@ -3,6 +3,7 @@ package net.i2p.util;
 /**
  * Usage: Copy from to
  *
+ * @deprecated only for use by installer, to be removed from i2p.jar, use FileUtil.copy()
  */
 public class Copy {
     public static void main(String args[]) {

core/java/src/net/i2p/util/Delete.java

@@ -3,6 +3,7 @@ package net.i2p.util;
 /**
  * Usage: Delete name
  *
+ * @deprecated only for use by installer, to be removed from i2p.jar, use FileUtil.rmdir()
  */
 public class Delete {
     public static void main(String args[]) {

core/java/src/net/i2p/util/Exec.java

@@ -5,6 +5,7 @@ import java.io.File;
 /**
  * Usage: Exec dir command [args ...]
  *
+ * @deprecated only for use by installer, to be removed from i2p.jar, use ShellCommand
  */
 public class Exec {
     public static void main(String args[]) {