#97 Extra carriage return in request breaks router micro_http

[Alistair Boyle]

Thanks for a really useful tool!
I use a my router to grab my public IP address. This worked with 3.8.1, but is now broken with 3.9.0. The router seems a little incompetent and the extra carriage return in the request means it does not respond.

A patch to remove this extra carriage return in the request, if the header and data are empty, is attached.