Added the SMB and SMBS handler interface structures and associated
functions required for SMB/CIFS operation.

Prefer ! rather than NULL in if statements, added comments and updated
function spacing, argument spacing and line spacing to be more readble.

If the scratch buffer already existed when the CRLF conversion was
performed then the buffer pointer would be checked twice for NULL. This
second check is only necessary if the call to malloc() was performed by
the first check.

Whilst I had moved the dot stuffing code from being performed before
CRLF conversion takes place to after it, in commit 4bd860a0, I had
moved it outside the 'when something read' block of code when meant
it could perform the dot stuffing twice on partial send if nread
happened to contain the right values. It also meant the function could
potentially read past the end of buffer. This was highlighted by the
following warning:

warning: `nread' might be used uninitialized in this function

smb.h:30:16: error: comma at end of enumerator list [-Werror=pedantic]

Added the necessary protocol and port definitions in order to support
SMB/CIFS.

Added the internal definitions and structures necessary for SMB/CIFS
support.

Added the connection structure that will be required in urldata.h for
SMB/CIFS based connections.

Added the initial source files and updated the relevant project files in
order to support SMB/CIFS.

Added --enable-smb and --disable-smb configuration options for the
upcoming SMB/CIFS protocol support.

Commit curl-7_23_1-143-g8218064 changed the parameter of
responsive_http_server to accept types other than IPv6 (converting
from a boolean to a string), but only considered the lower-case "ipv6"
and not the "IPv6" variant. This caused all servers to start in IPv4
mode instead.

This patch converts the remaining cases to "ipv6". While not strictly
necessary for the run*server variants, these got also converted for
consistency and to prevent future errors.

Signed-off-by: Peter Wu <peter@lekensteyn.nl>

Signed-off-by: Peter Wu <peter@lekensteyn.nl>

warning: unused variable 'data'
warning: variable 'addcookies' set but not used

...and some very minor coding style policing.

...and some comment typos!

Added support for the automatic conversion of Unix newlines to CRLF
during mail uploads.

Feature: http://curl.haxx.se/bug/view.cgi?id=1456

and some minor edits

refer to functions with the man page section properly

Makes the example much easier and straight-forward!

This makes it much easier to run multiple tests in the same directory,
just altering the command lines used.

Reported-by: Brian
Bug: http://curl.haxx.se/bug/view.cgi?id=1455

This reverts commit 217024a6.

Bug: https://github.com/bagder/curl/commit/217024a6#commitcomment-8693738

warning: variable 'connection_id' set but not used
warning: unused parameter 'lineno'

After commit 48d19acb the HTTP code would call Curl_nss_force_init()
twice when decoding a NTLM type-2 message, once directly and the other
through the call to Curl_sasl_decode_ntlm_type2_message().

In addition to NTLM, use Kerberos and SPNEGO as proxies to the crypto
feature.

...and converted tab characters, from commit 4b4e8a58, to spaces.