added as suggested by Bob Schader

will work even when following a Location:

describes, Bob Schader's research seems to agree.

the request isn't GET. Presumably, this is how it should be made.

taking place

for what HTTP request that is being used. The old bit-style fields are still
in there as well.

GET resume. Other resumes are upload-wise and don't care about this header
in the download stream

unfolded telwrite() instead of being a separate single function

Curl_write() and Curl_read() are here

Some functions changed prototype due to this change as well.

socket. Curl_ConnectHTTPProxyTunnel changed prototype.

added lots of explaining comments

curl will return an error when such an address is used.