Don't check argument types for internal functions without type hinting
Merge branch 'PHP-5.6'

* PHP-5.6:
  Don't check argument types for internal functions without type hinting
Merge branch 'master' of git.php.net:php-src

* 'master' of git.php.net:php-src:
  Fixed bug #53879 (DateTime::createFromFormat() fails to parse cookie expiration date)