Pointed out by Bjorn Reese.

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.

(and besides, we should be using the same %-code for all pointers)

defining, since the system headers themselves redefine getaddrinfo

with CURLOPT_PROXY can use a http:// prefix and user + password. The user
and password fields are now also URL decoded properly.

Test case 264 added 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.

binary zeroes within the headers. They confused libcurl to do wrong so the
downloaded headers become incomplete. The fix is now verified with test case
262.

"http://somehost?data" as it added a slash too much in the request ("GET
/?data/"...). Added test case 260 to verify.

times, like on my HP-UX 10.20 tests. And then lib/strerror.c badly assumed
the glibc version if the posix define wasn't set (since it _had_ found a
strerror_r).

warnings like:
  'x' may be used uninitialized in this function.

mode. (djgpp/Watt-32 has 3 ways). Should rewrite this using
"#elif ..", but maybe there is still broken cpp around?

A) Normal non-proxy HTTP:

 - no more "Pragma: no-cache" (this only makes sense to proxies)

B) Non-CONNECT HTTP request over proxy:

 - "Pragma: no-cache" is used (like before)
 - "Proxy-Connection: Keep-alive" (for older style 1.0-proxies)

C) CONNECT HTTP request over proxy:

 - "Host: [name]:[port]"
 - "Proxy-Connection: Keep-alive"

be returned at times when we want to ignore them. Test case 160 fails on Linux,
so I modify the comparison to check for _only_ the error bit set...

debug builds only. Made the ftp code use it on several places.