/*
 * call-seq:
 *   easy.cookies = "name1=content1; name2=content2;" => string
 *
 * Set cookies to be sent by this Curl::Easy instance. The format of the string should
 * be NAME=CONTENTS, where NAME is the cookie name and CONTENTS is what the cookie should contain.
 * Set multiple cookies in one string like this: "name1=content1; name2=content2;" etc.
 */
static VALUE ruby_curl_easy_cookies_set(VALUE self, VALUE cookies) {