Handle user error on Gzip response

[jeevatkm]

As everyone knows, certainly Go default client handles Gzip response. However there is a catch in it.

From https://github.com/golang/go/blob/master/src/net/http/transport.go

// DisableCompression, if true, prevents the Transport from
// requesting compression with an "Accept-Encoding: gzip"
// request header when the Request contains no existing
// Accept-Encoding value. If the Transport requests gzip on
// its own and gets a gzipped response, it's transparently
// decoded in the Response.Body. However, if the user
// explicitly requested gzip it is not automatically
// uncompressed.
DisableCompression bool

So if user by any chance adds header Accept-Encoding: gzip manually via resty then response will have an issue.

Goal is to add grace handling support for user error.