decoding where a write error (or abort return from a callback) didn't stop
  libcurl's processing.

made it an unsigned int. The type was only used in the curl_sockaddr struct
definition (only used by the curl_opensocket_callback). On all platforms I
could find information about, socklen_t is 32 unsigned bits large so I don't
think this will break the API or ABI. The main reason for this change is of
course for all the platforms that don't have a socklen_t definition in their
headers to build fine again. Providing our own configure magic and custom
definition of socklen_t on those systems proved to work but was a lot of
cruft, code and extra magic needed - when this very small change of type seems
harmless and still solves the missing socklen_t problem.

is an inofficial PROXY4 variant that sends the hostname to the proxy instead
of the resolved address (which is already supported by SOCKS5).  --socks4a is
the curl command line option for it and CURLOPT_PROXYTYPE can now be set to
CURLPROXY_SOCKS4A as well.

function but without a return statement. While fixing that, I also took care
about adding some better comments for the generated code.

(http://curl.haxx.se/mail/lib-2007-12/0252.html) in detect_proxy() which
failed to set the bits.proxy variable properly when an environment variable
told libcurl to use a http proxy.

(http://curl.haxx.se/bug/view.cgi?id=1850730) I wrote up test case 552. The
test is doing a 70K POST with a read callback and an ioctl callback over a
proxy requiring Digest auth. The test case code is more or less identical to
the test recipe code provided by Spacen Jasset (who submitted the bug report).

(http://curl.haxx.se/bug/view.cgi?id=1856628) and provided a fix for the
(small) memory leak in the SSL session ID caching code. It happened when a
previous entry in the cache was re-used.

components doesn't have read permission set.

directory components doesn't have read permission set.

--manual text.

a file truncation problem on Windows build targets triggered when retrying
a download with curl.

and makes wrong asumptions of build target when it isn't specified. So,
if no build target has been defined we will target WinXP when building
with MSVC 9.0 (VS2008).

defines in the SDK somehow differently so we have to add a define to the
config-win32.h file to make select.h compile nicely.

A failed attempt to repeat bug report #1850730 (ie the test works fine).

will prompt for a password. Denis Bredelet pointed out!

(http://curl.haxx.se/bug/view.cgi?id=1849764) with an included fix. He
identified a problem for re-used connections that previously had sent
Expect: 100-continue and in some situations the subsequent POST (that didn't
use Expect:) still had the internal flag set for its use. David's fix (that
makes the setting of the flag in every single request unconditionally) is
fine and is now used!

added the --no-keep-alive option that can disable that on demand.

values and what they mean

name from an IPv4-address or host-name. Using the service of
countries.nerd.dk.

link any executables when doing debug builds since they kind of assume
symbols provided by libcurl, but it also wrongly included acountry.c

Port OS400 compilation scripts to >= V5R2M0

define 's6_addr' as a macro.