Small fixes: deprecation and outdated test case.

removes a deprecation warning and syncs 01_request.t with the implementation (response sets `Connection: close`, but the test doesn't expect it to show up)

We may want to not rely on the ordering of the headers in the future, that may or may not change based on implementations etc ...
So perhaps we want to split the `@data[1]` by `"\r\n"` and do a set comparison?