/*
 * call-seq:
 *   easy.ftp_filemethod = value                      => fixnum or nil
 *
 * Controls how libcurl reaches files on the server. Valid options are Curl::CURL_MULTICWD,
 * Curl::CURL_NOCWD, and Curl::CURL_SINGLECWD (see libcurl docs for CURLOPT_FTP_METHOD).
 */
static VALUE ruby_curl_easy_ftp_filemethod_set(VALUE self, VALUE ftp_filemethod) {