nc-datadir: move .opcache location too

etc/nextcloudpi-config.d/nc-automount.sh

@@ -27,7 +27,7 @@ show_info()
 on boot or at the moment of insertion.
 
 Format your drive as ext4 in order to move NC datafolder or database
-VFAT or NTFS is not recommended and will not work without hackery
+VFAT or NTFS is not recommended for this task, as it does not suport permissions
 
 IMPORTANT: halt or umount the drive before extracting" \
   20 90

etc/nextcloudpi-config.d/nc-datadir.sh

@@ -30,6 +30,7 @@ because they do not provide a compatible user/permissions system" \
 
 configure()
 {
+  ## CHECKS
   local SRCDIR=$( cd /var/www/nextcloud; sudo -u www-data php occ config:system:get datadirectory )
   [ -d $SRCDIR ] || { echo -e "data directory $SRCDIR not found"; return 1; }
 
@@ -51,6 +52,7 @@ configure()
   [[ $( stat -fc%d / ) == $( stat -fc%d $BASEDIR ) ]] && \
     echo -e "INFO: moving data dir to another place in the same SD card\nIf you want to use an external mount, make sure it is properly set up"
 
+  ## COPY
   service apache2 stop
 
   cp -ra "$SRCDIR" "$DATADIR_" || return 1
@@ -60,6 +62,9 @@ configure()
   chown www-data:www-data "$DATADIR_/tmp"
   sed -i "s|^;\?upload_tmp_dir =.*$|upload_tmp_dir = $DATADIR_/tmp|" /etc/php/7.0/fpm/php.ini
 
+  # opcache dir
+  sed -i "s|^opcache.file_cache=.*|opcache.file_cache=$DATADIR_/.opcache|" /etc/php/7.0/mods-available/opcache.ini
+
   # datadir
   cd /var/www/nextcloud
   sudo -u www-data php occ config:system:set datadirectory --value=$DATADIR_