Ubuntu Mate 16.04 for Pi
Apache 2.4.10
PHP 7.0
MySQL 5.5
The installation is warning that apcu cache is not enabled. I've set the proper settings in php.ini and rebooted, but no change. I am thinking I need to enable backward compatibility by installing php-apcu-bc but this is the result when I try to install it
sudo apt-get install php-apcu-bc
Package php-apcu-bc is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source.