HTTP proxy if an FTP URL was given. libcurl now properly switches to pure HTTP
internally when an HTTP proxy is used, even for FTP URLs. The problem would
also occur with other multi-pass auth methods.

--features was used

set to 1, CURLOPT_NOBODY will now automatically be set to 0.

simple interface to extracting and setting cookies in libcurl's internal
"cookie jar". See the new cookie_interface.c example code.

trailer is then sent to the normal header callback/stream.

seems the Windows (MSVC) libc time functions may return data one hour off if
TZ is not set and automatic DST adjustment is enabled. This made
curl_getdate() return wrong value, and it also concerned internal cookie
expirations etc.

fix the CONNECT authentication code with multi-pass auth methods (such as
NTLM) as it didn't previously properly ignore response-bodies - in fact it
stopped reading after all response headers had been received. This could
lead to libcurl sending the next request and reading the body from the first
request as response to the second request. (I also renamed the function,
which wasn't strictly necessary but...)

The best fix would to once and for all make the CONNECT code use the
ordinary request sending/receiving code, treating it as any ordinary request
instead of the special-purpose function we have now. It should make it
better for multi-interface too. And possibly lead to less code...

Added test case 265 for this. It doesn't work as a _really_ good test case
since the test proxy is too stupid, but the test case helps when running the
debugger to verify.

address was not possible to use. It is now, but requires it written
RFC2732-style, within brackets - which incidently is how you enter numerical
IPv6 addresses in URLs. Test case 263 added to verify.

detects a bad Ipv6 situation and disables it automatically)

--trace, --trace-ascii and --verbose output. I also made the '>' display
separate each line on the linefeed so that HTTP requests etc look nicer in the
-v output.