docs: add implicit FTP over TLS documentation

docs/content/ftp.md

@@ -30,45 +30,27 @@ q) Quit config
 n/r/c/s/q> n
 name> remote
 Type of storage to configure.
+Enter a string value. Press Enter for the default ("").
 Choose a number from below, or type in your own value
- 1 / Amazon Drive
+[snip]
-   \ "amazon cloud drive"
+10 / FTP Connection
- 2 / Amazon S3 (also Dreamhost, Ceph, Minio)
-   \ "s3"
- 3 / Backblaze B2
-   \ "b2"
- 4 / Dropbox
-   \ "dropbox"
- 5 / Encrypt/Decrypt a remote
-   \ "crypt"
- 6 / FTP Connection 
    \ "ftp"
- 7 / Google Cloud Storage (this is not Google Drive)
+[snip]
-   \ "google cloud storage"
- 8 / Google Drive
-   \ "drive"
- 9 / Hubic
-   \ "hubic"
-10 / Local Disk
-   \ "local"
-11 / Microsoft OneDrive
-   \ "onedrive"
-12 / Openstack Swift (Rackspace Cloud Files, Memset Memstore, OVH)
-   \ "swift"
-13 / SSH/SFTP Connection
-   \ "sftp"
-14 / Yandex Disk
-   \ "yandex"
 Storage> ftp
+** See help for ftp backend at: https://rclone.org/ftp/ **
+
 FTP host to connect to
+Enter a string value. Press Enter for the default ("").
 Choose a number from below, or type in your own value
  1 / Connect to ftp.example.com
    \ "ftp.example.com"
 host> ftp.example.com
 FTP username, leave blank for current username, ncw
-user>
+Enter a string value. Press Enter for the default ("").
+user> 
 FTP port, leave blank to use default (21)
-port>
+Enter a string value. Press Enter for the default ("").
+port> 
 FTP password
 y) Yes type in my own password
 g) Generate random password
@@ -77,12 +59,14 @@ Enter the password:
 password:
 Confirm the password:
 password:
+Use FTP over TLS (Implicit)
+Enter a boolean value (true or false). Press Enter for the default ("false").
+tls> 
 Remote config
 --------------------
 [remote]
+type = ftp
 host = ftp.example.com
-user = 
-port =
 pass = *** ENCRYPTED ***
 --------------------
 y) Yes this is OK
@@ -119,6 +103,12 @@ will be time of upload.
 
 FTP does not support any checksums.
 
+### Implicit TLS ###
+
+FTP supports implicit FTP over TLS servers (FTPS). This has to be enabled
+in the config for the remote. The default FTPS port is `990` so the
+port will likely have to be explictly set in the config for the remote.
+
 <!--- autogenerated options start - DO NOT EDIT, instead edit fs.RegInfo in backend/ftp/ftp.go then run make backenddocs -->
 ### Standard Options
 
@@ -191,3 +181,6 @@ FTP could support server side move but doesn't yet.
 
 Note that the ftp backend does not support the `ftp_proxy` environment
 variable yet.
+
+Note that while implicit FTP over TLS is supported,
+explicit FTP over TLS is not.