JSONObject(Map) handling of null values has changed #296

Before 2010-12 the JSONObject-constructor
public JSONObject(Map map)
accepted null values in the map and transformed them to JSONObject.NULL

i.e.:

    public static void main(String[] args) throws UnknownHostException {
        Map<String, Object> test = new HashMap<String, Object>();
        test.put("foo", null);
        System.out.println(new JSONObject(test));
    }

would give
{ foo: null }

Since then, there is a
if (value != null) {
line in the constructor which prevents that and thus the program above gives:
{}

This has broken the logic in our software quite fundamentally.

What is more, it also seems to be inconsistent with JSONObject.wrap, where null-values are expected:

            if (object == null) {
                return NULL;
            }

Is there any chance that the old (and IMO better) behaviour is restored?