[Feature request] Please add APCu caching for php7

Since owncloud recommends APCu caching extension over redis and memcached in their official docs, I was hoping that easyengine devs would add APCu caching option to php7 compilation.

Thanks Saskia

reference: https://doc.owncloud.org/server/8.1/admin_manual/configuration_server/config_sample_php_parameters.html#memory-caching-backend-configuration