Deprecated public constructors instead of making it private.

src/main/java/org/json/CDL.java

@@ -23,6 +23,7 @@ Public Domain.
  * @author JSON.org
  * @version 2016-05-01
  */
+@Deprecated
 public class CDL {
 
     /**

src/main/java/org/json/Cookie.java

@@ -13,6 +13,7 @@ Public Domain.
  * @author JSON.org
  * @version 2015-12-09
  */
+@Deprecated
 public class Cookie {
 
     /**

src/main/java/org/json/CookieList.java

@@ -14,7 +14,8 @@ public class CookieList {
     /**
      * Constructs a new CookieList object.
      */
-    private CookieList() {
+    @Deprecated
+    public CookieList() {
     }
  
     /**

src/main/java/org/json/JSONML.java

@@ -17,7 +17,8 @@ public class JSONML {
     /**
      * Constructs a new JSONML object.
      */
-    private JSONML() {
+    @Deprecated
+    public JSONML() {
     }