Merge branch 'PHP-7.3'

* PHP-7.3:
  Avoid hash lookups in BIND_STATIC and BIND_LEXICAL opcode handlers. Encode static variable offset into opline->extended_value.

diff --cc Zend/zend_compile.c
Simple merge

diff --cc Zend/zend_compile.h
Simple merge

diff --cc Zend/zend_vm_def.h
Simple merge

diff --cc Zend/zend_vm_execute.h
Simple merge