you have less than 2 million elements in your dynar and don't
want of the extra complexity of catching exceptions when the
element is not found.
+ * Portability layer
+ - Make xbt_os_thread module (for thread portability) public.
+ Documentation is still to come, sorry.
* mmalloc module:
- Cleanups and simplifications to make it maintainable again.
- Exotic features (such as memalign and valloc) were removed.
