easy:SetOpt_Proxy_Transfer_Mode -- append FTP transfer mode to URL for proxy
Pass a value. If the value is set to 1 (one), it tells libcurl to set the
transfer mode (binary or ASCII) for FTP transfers done via an HTTP proxy, by
appending ;type=a or ;type=i to the URL. Without this setting, or it being set
to 0 (zero, the default), #CURLOPT_TRANSFERTEXT has no effect when
doing FTP via a proxy. Beware that not all proxies support this feature.