advise to add a .string() function

[Nyx2022]

now,rawhttp only has .body to get response body,however, this will occur "i/o timeout" problem in some cases such as in proxy environt,so i advise rawhttp to add a .string() to get response body directly

[Mzack9999]

@Nyx2022 rawhttp attempts to return the data as a valid compatible net.Http struct so that it can be used as a drop-in replacement of net/http where complete control is needed. I think the proxy you are testing against might reject malformed requests. Unless you are doing it for security purposes, or require full control of the parts of the request, probably using the standard library would make proxy interactions much more straightforward.