Merge branch 'PHP-7.0' into PHP-7.0.0

* PHP-7.0: (103 commits)
  Add more tests for closure binding
  Forbid "fake" closure rebinding
  increase API versions
  fork test for ICU 56.1
  fork test for ICU-56.1
  fix test for ICU-56.1
  fix test
  Double declaration
  fix stack overflow
  Generally run all tests in sapi folder by default
  Fixed bug #70685
  Normalize rebinding failures
  Implemented file_cache_fallback mechanism
  Improve previous fix
  Fixed bug #70681
  update NEWS
  update NEWS
  Fixed bug #70630 (Closure::call/bind() crash with ReflectionFunction->getClosure())
  Fixed reference cuntmting for closures (previously we didn't increment reference counter for "internal" closures)
  Fixed infinity recurion if we create closure on top of other closure.
  ...