ftp: add support for disable_utf8 option - fixes #6209

docs/content/flags.md

@@ -337,6 +337,7 @@ and may be set in the config file.
       --ftp-concurrency int                          Maximum number of FTP simultaneous connections, 0 for unlimited
       --ftp-disable-epsv                             Disable using EPSV even if server advertises support
       --ftp-disable-mlsd                             Disable using MLSD even if server advertises support
+      --ftp-disable-utf8                             Disable using UTF-8 even if server advertises support
       --ftp-disable-tls13                            Disable TLS 1.3 (workaround for FTP servers with buggy TLS)
       --ftp-encoding MultiEncoder                    The encoding for the backend (default Slash,Del,Ctl,RightSpace,Dot)
       --ftp-explicit-tls                             Use Explicit FTPS (FTP over TLS)

docs/content/ftp.md

@@ -267,6 +267,17 @@ Properties:
 - Type:        bool
 - Default:     false
 
+#### --ftp-disable-utf8
+
+Disable using UTF-8 even if server advertises support.
+
+Properties:
+
+- Config:      disable_utf8
+- Env Var:     RCLONE_FTP_DISABLE_UTF8
+- Type:        bool
+- Default:     false
+
 #### --ftp-writing-mdtm
 
 Use MDTM to set modification time (VsFtpd quirk)