advised to add a feature

[Nyx2022]

in python,we can set host in headers to the value that different from the real host of http url,however,by my test,retryablehttp-go may not support this feature,so i advise retryablehttp-go to support this feature

[Mzack9999]

@Nyx2022 This is already supported. You can do it either by setting request.Host="whatever" or by setting the header directly:

req, _ := retryablehttp.NewRequest(http.MethodGet,"http://host",nil)
req.Host = "whatever"
req.Header.Set("Host", "whatever")