Add PHP Diagnostics

I created a feature in Jexus Manager called PHP Diagnostics,

https://www.jexusmanager.com/en/latest/tutorials/php-diagnostics.html

Should be able to cherry pick some of checks to PHP Manager.

It can be worked on once 2.0 release is out.

Added a few checks in e6f90081bc5c5ea8ebc60bf2166908862ed9d2c6,

• Obsolete release check.
• Expiring release check.
• Visual C++ runtime check.

Duplicate to #62