Expand ZE to Zend Engine and remove Zend Engine version.
per Christoph M. Becker's comment for PR-8008.
Signed-off-by: Su, Tao <tao.su@intel.com>
Closes GH-8057.
Closes GH-8008
As a new learner to PHP Zend VM, the first place I can find information
is this README.md. Unfortunately, it has not included the latest Zend VM
kind and code generation script.
With code reading and trail-and-error experiments, I found a few updates
that might be helpful to new learners.
ChangeLog:
1) Add HYBRID threading model
2) Remove --without-old-executor option and description
3) ZE2 --> ZE3 (Since PHP 7)
4) Change default VM kind from CALL to HYBRID
Signed-off-by: Su, Tao <tao.su@intel.com>
