Check for DB_PATH and FILES_PATH

Newer versions of the script no longer refer to these configuration variables. They have been replaced with WP_ROOT. If these variables are detected in the config file, inform the user to update the config file before running the script.

wordpress-jail.sh

@@ -85,6 +85,11 @@ if [ -z "${TIME_ZONE}" ]; then
   exit 1
 fi
 
+if [ -n "${FILES_PATH}" ] || [ -n "${DB_PATH}" ]; then
+  print_err 'Configuration error: WP_ROOT replaces FILES_PATH and DB_PATH in newer script versions. Update ${CONFIG_NAME} and run the script again.'
+  exit 1
+fi
+
 DB_PATH=${POOL_PATH}${WP_ROOT%/}/db
 FILES_PATH=${POOL_PATH}${WP_ROOT%/}/files