message: let's ignore the backup directory
  it will be unlikely to have lost+found on non-ext filesystems.
diff: @@ -12,7 +12,7 @@ socket = /run/mysqld/mysqld.sock
  character_set_server = utf8
  collation_server = utf8_bin
  expire_logs_days = 10
  -ignore_db_dirs= lost+found
  +ignore_db_dirs=backup
  innodb_buffer_pool_size = 256M
  innodb_file_format = Barracuda
  innodb_large_prefix = 1
  