libssh2 1.2.6 and later handle >32bit file sizes properly even on 32bit
architectures and we make sure to use that ability.

Reported by: Mikael Johansson
Bug: http://curl.haxx.se/mail/lib-2010-08/0052.html

I added all OBJECTPOINT curl_easy_setopt() options from 178 to 202. Left
to add: the five FUNCTIONPOINT (callbacks) options added since:

SSH_KEYFUNCTION
INTERLEAVEFUNCTION
CHUNK_BGN_FUNCTION
CHUNK_END_FUNCTION
FNMATCH_FUNCTION

Simply because the TCP might be connected already we cannot skip the
proxy connect procedure. We need to be careful to not overload more
meaning to the bits.tcpconnect field like this.

With this fix, SOCKS proxies work again when the multi interface is
used. I believe this regression was added with commit 4b351d01,
released as 7.20.1.

Left todo: add a test case that verifies this functionality that
prevents us from breaking it again in the future!

Reported by: Robin Cornelius
Bug: http://curl.haxx.se/bug/view.cgi?id=3033966

This is only to avoid warnings on some systems.

There is an implicit conversion from "unsigned long" to "long";
rounding, sign extension, or loss of accuracy may result.

These defines are only needed for older Watcom versions (< 1280).

The --retry logic does retry HTTP when some specific response codes are
returned, but because the -f option sets the CURLOPT_FAILONERROR to
libcurl, the return codes are different for such situations and then the
curl tool failed to consider it for retrying.

Reported by: Mike Power
Bug: http://curl.haxx.se/bug/view.cgi?id=3037362

Commit 496002ea (released in 7.20.1) broke FTPS when using the
multi interface and OpenSSL was used. The condition for the non-blocking
connect was incorrect.

Reported by: Georg Lippitsch
Bug: http://curl.haxx.se/mail/lib-2010-07/0270.html

conversion from 'size_t' to 'curl_socklen_t', possible loss of data

Reported by: Adam Light

The SOCKET type in Win64 is 64 bits large (and thus so is curl_socket_t
on that platform), and long is only 32 bits. It makes it impossible for
curl_easy_getinfo() to return a socket properly with the
CURLINFO_LASTSOCKET option as for all other operating systems.

Previously the host name buffer was only used if gethostname() exists,
but since we converted that into a curl private function that function
always exists and will be used so the buffer needs to exist for all
cases/systems.

A shared library tests/libtest/.libs/lihostname.so is preloaded in NTLM
test-cases to override the system implementation of gethostname().  It
makes it possible to test the NTLM authentication for exact match, and
this way test the implementation of MD4 and DES.

If LD_PRELOAD doesn't work, a debug build willl also workk as debug
builds are now made to prefer a specific environment variable and will
then return that content as host name instead of the actual one.

Kamil wrote the bulk of this, Daniel Stenberg polished it.

lib/Makefile.Watcom works fine already, for src/Makefile.Watcom we
need first to tweak src/Makefile.inc a bit - therefore the handtweaked
list still exists for now.

- make both libcurl and curl makefiles use register calling convention
  (previously libcurl had stack calling convention).
- added include paths to the Watcom headers so its no longer required
  to set the environment vars for this.
- added -wcd=201 to supress compiler warning about unreachable code.
- use macros for all tools, and removed dependency on GNU tools like rm.
- make ipv6 and debug builds controlable via env vars and so make them
  optional instead of default.
- commented WINLDAPAPI and WINBERAPI since they broke with OW 1.8, and
  it seems they're not needed (anymore?).
- added rule for hugehelp.c.cvs so that it will be created when not
  already exist - this is required for building from a release tarball
  since there we have no hugehelp.c.cvs, thus compilation broke.
- removed C_ARG creation from lib/Makefile.Watcom and use CFLAGS
  directly as done too in src/Makefile.Watcom - this has the benefit
  that we will see all active cflags and defines during compile....