This fixes warnings about conversions to int

smb.c:398: warning: comparison of integers of different signs:
           'ssize_t' (aka 'long') and 'unsigned long'
smb.c:443: warning: comparison of integers of different signs:
           'ssize_t' (aka 'long') and 'unsigned long'

As local files could be accessed through \\localhost\c$.

This patch enables SMB/CIFS support in libcurl.

smb.c:322: warning: conversion to 'short unsigned int' from 'unsigned
           int' may alter its value
smb.c:323: warning: conversion to 'short unsigned int' from 'unsigned
           int' may alter its value
smb.c:482: warning: conversion to 'short unsigned int' from 'int' may
           alter its value
smb.c:521: warning: conversion to 'unsigned int' from 'curl_off_t' may
           alter its value
smb.c:549: warning: conversion to 'unsigned int' from 'curl_off_t' may
           alter its value
smb.c:550: warning: conversion to 'short unsigned int' from 'int' may
           alter its value

smb.c:489: warning: declaration of 'close' shadows a global declaration
smb.c:511: warning: declaration of 'read' shadows a global declaration
smb.c:528: warning: declaration of 'write' shadows a global declaration

smb.c:212: warning: unused parameter 'done'
smb.c:380: warning: ISO C does not allow extra ';' outside of a function
smb.c:812: warning: unused parameter 'premature'
smb.c:822: warning: unused parameter 'dead'

smb.c:311: warning: conversion from 'unsigned __int64' to 'u_short',
           possible loss of data
smb.c:425: warning: conversion from '__int64' to 'unsigned short',
           possible loss of data
smb.c:452: warning: conversion from '__int64' to 'unsigned short',
           possible loss of data

smb.c:162: error: comma at end of enumerator list
smb.c:469: warning: conversion from 'size_t' to 'unsigned short',
           possible loss of data
smb.c:517: warning: conversion from 'curl_off_t' to 'unsigned int',
           possible loss of data
smb.c:545: warning: conversion from 'curl_off_t' to 'unsigned int',
           possible loss of data

Initial implementation of the SMB/CIFS protocol.

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.

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

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

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().

This commit disables pipelining for HTTP/2 or upgraded connections.  For
HTTP/2, we do not support multiplexing.  In general, requests cannot be
pipelined in an upgraded connection, since it is now different protocol.

When the connection code decides to close a socket it informs the multi
system via the Curl_multi_closed function. The multi system may, in
turn, invoke the CURLMOPT_SOCKETFUNCTION function with
CURL_POLL_REMOVE. This happens after the socket has already been
closed. Reorder the code so that CURL_POLL_REMOVE is called before the
socket is closed.

Moved target autodetection block after defining CC macro.

Debug output 'typo' fix.

Don't print an extra "0x" in
  * Pipe broke: handle 0x0x2546d88, url = /

Add debug output.
Print the number of connections in the connection cache when
  adding one, and not only when one is removed.

Fix typos in comments.

... as it was before I changed the loop in commit e04ccbd5. It caused
test 2030 and 2032 to fail.