anshul-jain881

Recommendation on cleaning of HostClient.

2

As of now the only way to override `Host` header is to use `HostClient` as per [Issue 318](https://github.com/valyala/fasthttp/issues/318). This means we have to manage reusing/cleanup of HostClients ourselves which [fasthttp.Client](https://github.com/valyala/fasthttp/blob/master/client.go#L450-L452)...