more extensive note on unserialize() change
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  more extensive note on unserialize() change
more extensive note on unserialize() change
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  more extensive note on unserialize() change
  more extensive note on unserialize() change