/*
 * call-seq:
 *   easy.http_auth_types = fixnum or nil             => fixnum or nil
 *   easy.http_auth_types = [:basic,:digest,:digest_ie,:gssnegotiate, :ntlm, :any, :anysafe]
 *
 * Set the HTTP authentication types that may be used for the following
 * +perform+ calls. This is a bitmap made by ORing together the
 * Curl::CURLAUTH constants.
 */
static VALUE ruby_curl_easy_http_auth_types_set(int argc, VALUE *argv, VALUE self) {//VALUE self, VALUE http_auth_types) {