ftp: Add force_list_hidden option

Forces the use of `LIST -a` command
when listing a directory which should
list all hidden folders and files.

docs/content/flags.md

@@ -357,6 +357,7 @@ and may be set in the config file.
       --ftp-tls-cache-size int                       Size of TLS session cache for all control and data connections (default 32)
       --ftp-user string                              FTP username (default "$USER")
       --ftp-writing-mdtm                             Use MDTM to set modification time (VsFtpd quirk)
+      --ftp-force-list-hidden                        Use LIST -a to force listing of hidden files and folders. This will disable the use of MLSD.
       --gcs-anonymous                                Access public buckets and objects without credentials
       --gcs-auth-url string                          Auth server URL
       --gcs-bucket-acl string                        Access Control List for new buckets

docs/content/ftp.md

@@ -310,6 +310,17 @@ Properties:
 - Type:        bool
 - Default:     false
 
+#### --ftp-force-list-hidden
+
+Use LIST -a to force listing of hidden files and folders. This will disable the use of MLSD.
+
+Properties:
+
+- Config:      force_list_hidden
+- Env Var:     RCLONE_FTP_FORCE_LIST_HIDDEN
+- Type:        bool
+- Default:     false
+
 #### --ftp-idle-timeout
 
 Max time before closing idle connections.