Before you can start using this module;
- Make sure you have configured client.conf to point to your FastDFS cluster
  and that you see the cluster with fdfs_monitor
- Add this to your php.ini file
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fastdfs_client.base_path = /var/tmp
fastdfs_client.connect_timeout = 2
fastdfs_client.network_timeout = 60
fastdfs_client.log_level = info
fastdfs_client.log_filename =
fastdfs_client.http.anti_steal_secret_key =
fastdfs_client.tracker_group_count = 1
fastdfs_client.tracker_group0 = /usr/local/etc/fdfs/client.conf
fastdfs_client.use_connection_pool = false
fastdfs_client.connection_pool_max_idle_time = 3600