FTP: unsupported path
File modules/access/ftp.c contain block:
if( p_sys->url.psz_path &&
(p_sys->features.b_unicode ? IsUTF8 : IsASCII)(p_sys->url.psz_path) == NULL )
{
msg_Err( p_access, "unsupported path: \"%s\"", p_sys->url.psz_path );
goto error;
}
FTP server can use UTF-8 encoding, but don't show it (FEAT command)! FTP server can use any encoding, for example Windows-1252!
I recommend simply removing this block of code.