PHP8.0 compatibility release - v2.2.6

SCHLIX CMS v2.2.6 has been released and it is the first release of 2021 with major focus on the new PHP 8.0 compatibility.

With the v2.2.6 release, the core SCHLIX content management system will be compatible with PHP from version 5.6 to 8.0. However, this may not always be the case with its add-ons (especially if it uses composer), which are not always developed in house.

There could a secondary compatibility release in February or March once we've completed further testing with the next release of PHP 8.0.x. The main issue for the current PHP version (8.0.0) is the incompatibility if the JIT is enabled (off by default). Please note that during our testing, we encountered segmentation fault as described in https://bugs.php.net/bug.php?id=80480. Other than this issue, everything else seems to works.