Related to #781 and #517.

As described in #781, Feign overrides the timeouts configured in my Apache RequestConfig, even if I don't set custom request options in the Feign builder. This is unexpected behavior.

The change introduced to fix #517 copies the existing RequestConfig, but then immediately overwrites the timeouts, again, even if no Feign request options are set.

每执行novate.xxx() 给上层返回了一个Subscription，上层可以调用unsubscribe()来进行取消！

 if (!subscription.isUnsubscribed()) {
     subscription.unsubscribe();
 }

说是这么取消，但是我怎么用呢，能不能详细点，或者举个例子

⚠️ Is your feature request related to a problem? Please describe

Currently there is some inconsistency in having README in develop branch.
In case of adding some feature and its description into develop users see this description and think that this feature is available in the latest stable release, while it might be not released yet. Such situation happened recently.
Also, Chuc