Use preprocessor symbols WINBIND_NTLM_AUTH_ENABLED and WINBIND_NTLM_AUTH_FILE
for Samba's winbind daemon ntlm_auth helper code implementation and filename.

Retain preprocessor symbol USE_NTLM_SSO for NTLM single-sign-on feature
availability implementation independent.

For test harness, prefix NTLM_AUTH environment vars with CURL_

Refactor and rename configure option --with-ntlm-auth to --enable-wb-ntlm-auth[=FILE]

The 20xx range is for multiple sequential tests.

This reverts commit bc6e6a46.

Initialize variables when connectdata object is created.

Defining NCOMPAT eliminates the backwards-compatibility macros
that are the source of the problem and which we don't need,
anyway.

Fix compiler warning

This caused fake_ntlm to abort due to an invalid command
causing sporadic test 2005 failures.

Enhance test harness fake_ntlm logging upon invalid input.

Fix compiler warning

Provide some error tracing and fix execl() calling.

Ensure test harness fake_ntlm main function can properly handle arguments.

Use fake_ntlm absolute filename in NTLM_AUTH environment variable for test
2005 definition.

Also, set the test number in the test data file so fake_ntlm can
be reused in future tests.

When an easy handle is used to download an URI which has no
Content-Length header (or equivalent) after downloading an URI which
does, the value from the previous transfer is reused and returned by
CURLINFO_CONTENT_LENGTH_DOWNLOAD. This is because the progress flags
(used to determine whether such a header was received) are not reset
between transfers.

Bug: http://curl.haxx.se/bug/view.cgi?id=3370895

When libcurl has said to the server that there's a POST or PUT coming
(with a content-length and all) it has to either deliver that amount of
data or it needs to close the connection before trying a second request.

Adds test case 1129, 1130 and 1131

The bug report is about when used with 100-continue, but the change is
more generic.

Bug: http://curl.haxx.se/mail/lib-2011-06/0191.html
Reported by: Steven Parkes

Bug: http://curl.haxx.se/mail/lib-2011-07/0109.html

"test -e" is POSIX but clearly was not supported by the SunOS sh
version, -f is supported and should be a decent equivalent

Bug: http://curl.haxx.se/bug/view.cgi?id=3371574

With the use of the 'ntlm_auth' tool from the Samba project

Log texts also modified and some white space edits

Upgrade ILE/RPG binding to 7.21.7.
Update OS400 documentation accordingly.

We should probably also make sure that [protocol]_proxy for all possible
protocols libcurl supports are unset.