Fixed Bug #67538 (SPL Iterators use-after-free)
Fixed bug #67539 (ArrayIterator use-after-free due to object change during sorting)
update NEWS
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  update NEWS
  Fixed bug #67539 (ArrayIterator use-after-free due to object change during sorting)
  Fixed Bug #67538 (SPL Iterators use-after-free)
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  update NEWS
  Fixed bug #67539 (ArrayIterator use-after-free due to object change during sorting)
  Fixed Bug #67538 (SPL Iterators use-after-free)
Revert "Fix bug #66568: the second arg for unserialize is optional." as we already reverted the introduction of the second arg.

This reverts commit aefc8f22b35999624f3a579696cf68b389f41ae8.

Conflicts:
	NEWS