/*
 * call-seq:
 *   easy.low_speed_time = fixnum or nil        => fixnum or nil
 *
 * Set the time (in seconds) that the transfer should be below the
 * +low_speed_limit+ for the library to consider it too slow and abort.
 */
static VALUE ruby_curl_easy_low_speed_time_set(VALUE self, VALUE low_speed_time) {