Fixed bug #66474 (Optimizer bug in constant string to boolean conversion)
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Fixed bug #66474 (Optimizer bug in constant string to boolean conversion)

Conflicts:
	NEWS
Merge branch 'PHP-5.6'

* PHP-5.6:
  Fixed bug #66474 (Optimizer bug in constant string to boolean conversion)