setup the Makefile in tests/libtest/

or not

set of include files during tests

multi interface works with file:// URLs fine (previously it crashed). This
won't make it work on Windows though...

anymore!

Cut off name from option

decreased the write buffer size to 16KB to perform a lot better on Windows(!)

regular transfer process. This required some new tweaks, like for example
we need to be able to tell the tranfer loop to not chunky-encode uploads
while we're transferring the rest of the request...

make sure that it isn't all sent off in one single send() but instead
really tests the multiple-part-send logic.

with chunked transfer-encoding uploads added

read callback, and thus won't put a lot of stress on the request sending
code (which currently does an ugly loop).