Detect between apc and apcu for opcache detection
Detect between apc and apcu for opcache detection

- apc.enable is used for both APC and APCu; we only need to worry about it in
  the case of the former.

gartner/zf-apigility-admin,gartner/zf-apigility-admin,ildanno/zf-apigility-admin,jguittard/zf-apigility-admin,guliano/zf-apigility-admin,jguittard/zf-apigility-admin,ildanno/zf-apigility-admin,guliano/zf-apigility-admin