Improved autotests Added target 'server' to be able to run the server outside the test process.
When retrieving data block by block, use 8_192 instead of 1_024 (since 1_024 is too small most of the time)
Merged REQUEST.input and REQUEST.chunked_input Now REQUEST.input handles directly the chunked transfer encoding, or the non chunked. Kept REQUEST.is_chunked_input since it matters that Content-Length is 0 even if there are input (chunked) data.
