Custom telnet options
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TELNETOPTIONS,
struct curl_slist *cmds);
Provide a pointer to a curl_slist with variables to pass to the telnet negotiations. The variables should be in the format <option=value>. libcurl supports the options 'TTYPE', 'XDISPLOC' and 'NEW_ENV'. See the TELNET standard for details.
NULL
TELNET
TODO
Along with TELNET
Returns CURLE_OK if TELNET is supported, and CURLE_UNKNOWN_OPTION if not.