X2CRM updates

After a server upgrade X2CRM stopped working. I'm not sure but it kind-of seems like an abandoned project? A client of mine uses the software so I needed to make some updates to get it working for them. They are posted on GH if anybody needs.

https://github.com/arduent/X2CRM

+ Updated to run using PHP 8.0x

+ Updated to make it work with modern MySql/MariaDB server ie, ONLY_FULL_GROUP_BY is now set by default, which totally breaks all the join/'group by' queries in X2CRM.

+ Updates to fix for vulnerabilities reported in CVE-2021-27288, CVE-2020-21088.

+ Added some bug fixes from ignored pull requests on main repo.

+ Added translation updates from ignored pull requests on main repo.