Introducing a new variable `packweb_multiphp_versions: []`.
While set empty, packweb-apache will setup a regular packweb.
When filled with PHP Versions, it will handle :
- LXC Container setup and config (as a dependencie of lxc-php role)
- Ensure evoadmin-web will set the rights versions in the config files
by setting evoadmin_multiphp_versions
Exemple value : `packweb_multiphp_versions: ['php70', 'php73']`
That will call lxc-php to create both PHP 7.0 and PHP 7.3 containers.