Merge branch 'PHP-7.4'

* PHP-7.4:
  Introduce extra counter to avoid RTD key collisions

diff --cc Zend/zend.c
Simple merge

diff --cc Zend/zend_compile.c
Simple merge

diff --cc Zend/zend_globals.h
Simple merge

diff --cc ext/opcache/zend_accelerator_util_funcs.c
Simple merge