Need a way to specify libcurl options

I need some way to specify additional options for libcurl, but at the moment there is no way to access the CURL* handler.

For example I want the client to connect via SOCKS5 proxy with authorization, increase connection timeouts and make it not complain about self-signed SSL certificates. Here is the list of libcurl options I would use:

curl_easy_setopt(handler, CURLOPT_PROXY, proxy);
curl_easy_setopt(handler, CURLOPT_PROXYPORT, port);
curl_easy_setopt(handler, CURLOPT_PROXYTYPE, type);
curl_easy_setopt(handler, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
curl_easy_setopt(handler, CURLOPT_PROXYUSERPWD, userpwd);
curl_easy_setopt(handler, CURLOPT_TIMEOUT, timeout);
curl_easy_setopt(handler, CURLOPT_CONNECTTIMEOUT, 10);
curl_easy_setopt(handler, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt(handler, CURLOPT_SSL_VERIFYPEER, 0);