Continuing commit 0eb3d15c more return code variable name changes.

Code cleanup to try and synchronise code between the different SSPI
based authentication mechanisms.

Code cleanup to try and synchronise code between the different SSPI
based authentication mechanisms.

Don't call CompleteAuthToken() after InitializeSecurityContext() has
returned SEC_I_CONTINUE_NEEDED as this return code only indicates the
function should be called again after receiving a response back from
the server.

This only affected the Digest and NTLM authentication code.

Each shows evidence of flakiness on at least one platform on
the autobuilds. Users can use this keyword to skip these tests
if desired.

For consistency with other areas of the NTLM code propagate all errors
from Curl_ntlm_core_mk_nt_hash() up the call stack rather than just
CURLE_OUT_OF_MEMORY.

Continuing commit 0eb3d15c more return code variable name changes.

Code cleanup to try and synchronise code between the different SSPI
based authentication mechanisms.

Code cleanup to try and synchronise code between the different SSPI
based authentication mechanisms.

Code cleanup to try and synchronise code between the different SSPI
based authentication mechanisms.

Continuing commit 0eb3d15c more return code variable name changes.

Added support for WinIDN build configurations to the VC8 and VC9
project files.

If Apple ever drops SSLv3 support from the Security framework, we'll fail with an error if the user insists on using SSLv3.

- Remove SSLv3 from SSL default in darwinssl, schannel, cyassl, nss,
openssl effectively making the default TLS 1.x. axTLS is not affected
since it supports only TLS, and gnutls is not affected since it already
defaults to TLS 1.x.

- Update CURLOPT_SSLVERSION doc

... for the local variable name in functions holding the return
code. Using the same name universally makes code easier to read and
follow.

Also, unify code for checking for CURLcode errors with:

 if(result) or if(!result)

instead of

 if(result == CURLE_OK), if(CURLE_OK == result) or if(result != CURLE_OK)

Detected by cppcheck.

Detected by cppcheck.

Variable already assigned a few lines up.

Detected by cppcheck.

The variable is already assigned, skip the duplicate assignment.

Pointed out by cppcheck.

Prefer usage of Perl modules for sha1 calculation since there
might be systems where openssl is not installed or not in path.
If openssl is used for sha1 calculation then dont rely on cut
since it is usually not available on other systems than Linux.

Bug: http://curl.haxx.se/bug/view.cgi?id=1437
Reported-by: Julien