Standard proxy supported process proxy response

[liuliqiang]

While it's possible to process a request before sending it to the proxy, the standard proxy doesn't provide a way to process the proxy response before flushing it out to the clients.

Hello, i saw this description in the README doc. It seems not right now, in struct ReverseProxy there exists a method named ModifyResponse func(*http.Response) error can do this.

[netroy]

Hey Liqiang Liu (@liuliqiang), looks like ModifyResponse was added an year after this repo was unintentionally abandoned (I left the org).