7166055: Javadoc for WeakHashMap contains misleading advice Reviewed-by: dholmes, mduigou

7173432: Handle null key at HashMap resize Summary: If the key to be inserted into a HashMap is null and the table needs to be resized as part of the insertion then addEntry will try to recalculate the hash of a null key. This will fail with an NPE. Reviewed-by: darcy

Merge