Compiler warning fix

Check for USE_WINSOCK instead of WIN32 where the check was done
to verify winsock API availability.

Explicit typecast for Curl_debug() size argument

Support for FTP third party transfers is now dropped

Compiler warning fix

Major overhaul introducing http pipelining support and shared connection
cache within the multi handle.

Based on a patch by Armel Asselin, the FTP code no longer re-issues the TYPE
command on subsequent requests on a re-used connection unless it has to.

Use platform's native types for recv() and send() arguments.

additional renames of Curl_ourerrno => Curl_sockerrno

Roland Blom filed bug report #1481217
(http://curl.haxx.se/bug/view.cgi?id=1481217), with follow-ups by Michele Bini
and David Byron. libcurl previously wrongly used GetLastError() on windows

Roland Blom filed bug report #1481217
(http://curl.haxx.se/bug/view.cgi?id=1481217), with follow-ups by Michele Bini
and David Byron. libcurl previously wrongly used GetLastError() on windows to
get error details after socket-related function calls, when it really should
use WSAGetLastError() instead.

When changing to this, the former function Curl_ourerrno() is now instead
called Curl_sockerrno() as it is necessary to only use it to get errno from
socket-related functions as otherwise it won't work as intended on Windows.

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David McCreedy brought line end conversions when doing FTP ASCII
transfers. They are done on non-windows systems and translate CRLF to LF.

First commit of David McCreedy's EBCDIC and TPF changes.

GnuTLS support added. There's now a "generic" SSL layer that we use all over
internally, with code provided by sslgen.c. All SSL-layer-specific code is
then written in ssluse.c (for OpenSSL)

GnuTLS support added. There's now a "generic" SSL layer that we use all over
internally, with code provided by sslgen.c. All SSL-layer-specific code is
then written in ssluse.c (for OpenSSL) and gtls.c (for GnuTLS).

As far as possible, internals should not need to know what SSL layer that is
in use. Building with GnuTLS currently makes two test cases fail.

TODO.gnutls contains a few known outstanding issues for the GnuTLS support.

GnuTLS support is enabled with configure --with-gnutls

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Removed security.h since it shadows an include file mingw needs when building
for SSPI support. The contents of the file has been moved into the krb4.h file.

FTP third transfer support overhaul. See CHANGES for details.

oops, variables first then code

Prevent failf() from using the va_list variable more than once.
See bug report #1088962 and Single Unix Specification:
http://www.opengroup.org/onlinepubs/007908799/xsh/vfprintf.html

Fixed so that the final error message is sent to the verbose info "stream"
even if no errorbuffer is set.

#include "strerror.h" to get the strerror proto

add proper error message when send() fails

removed tabs and trailing whitespace from source

additional typecasts to please MIPSPro on 64bit IRIX

Gisle's "SSL patch" from June 16th 2004, modified by me as discussed on the
mailing list.

prevent compiler warning with picky compilers

When sending info about which host that sends what, include proper direction
to/from, based on a suggestion from Alexander Krasnostavsky