Port may be incorrectly omitted from the Host header

[wilkinsona]

When a non-standard port is being used (an HTTP request on a port other than 80 or an HTTPS request on a port other than 443), the request's Host header should include the port. While OperationRequestFactory will add a Host header if one is not already present, it currently doesn't include the port. The most obvious effect of this is that the Host header in the HTTP request snippet may be incorrect.