Set order in which to attempt tls vs ssl when using ftp
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTPSSLAUTH, long order);
Pass a long using one of the values from below, to alter how libcurl issues "AUTH TLS" or "AUTH SSL" when FTP over SSL is activated. This is only interesting if CURLOPT_USE_SSL(3) is also set.
Possible order values:
Allow libcurl to decide.
Try "AUTH SSL" first, and only if that fails try "AUTH TLS".
Try "AUTH TLS" first, and only if that fails try "AUTH SSL".
Added in 7.12.2
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.