Fix opcache.revalidate_freq per-request behavior
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Fix opcache.revalidate_freq per-request behavior
Merge branch 'PHP-5.6'

* PHP-5.6:
  Fix opcache.revalidate_freq per-request behavior

Conflicts:
	ext/opcache/ZendAccelerator.h