updated MSVC build instructions.

      Microsoft command line style

      ----------------------------

        Run the 'vcvars32.bat' file to get a proper environment. The

        vcvars32.bat file is part of the Microsoft development environment and

        you may find it in 'C:\Program Files\Microsoft Visual Studio\vc98\bin'

        provided that you installed Visual C/C++ 6 in the default directory.

        Then run 'nmake vc' in curl's root directory.

        If you want to compile with zlib support, you will need to build

        zlib (http://www.gzip.org/zlib/) as well. Please read the zlib 

        documentation on how to compile zlib. Define the ZLIB_PATH environment 

        variable to the location of zlib.h and zlib.lib, for example:

          set ZLIB_PATH=c:\zlib-1.2.1

        Then run 'nmake vc-zlib' in curl's root directory.

        If you want to compile with SSL support you need the OpenSSL package.

        Please read the OpenSSL documentation on how to compile and install

        the OpenSSL libraries.  The build process of OpenSSL generates the

        libeay32.dll and ssleay32.dll files in the out32dll subdirectory in

        the OpenSSL home directory.  OpenSSL static libraries (libeay32.lib,

        ssleay32.lib, RSAglue.lib) are created in the out32 subdirectory.

        Run the 'vcvars32.bat' file to get a proper environment. The

        vcvars32.bat file is part of the Microsoft development environment and

        you may find it in 'C:\Program Files\Microsoft Visual Studio\vc98\bin'

        provided that you installed Visual C/C++ 6 in the default directory.

        Before running nmake define the OPENSSL_PATH environment variable with

        the root/base directory of OpenSSL, for example:

          set OPENSSL_PATH=c:\openssl-0.9.7a

        lib/Makefile.vc6 depends on zlib (http://www.gzip.org/zlib/) as well.

        Please read the zlib documentation on how to compile zlib.  Define the

        ZLIB_PATH environment variable to the location of zlib.h and zlib.lib,

        for example:

          set ZLIB_PATH=c:\zlib-1.1.4

          set OPENSSL_PATH=c:\openssl-0.9.7d

        Then run 'nmake vc-ssl' or 'nmake vc-ssl-dll' in curl's root

        directory.  'nmake vc-ssl' will create a libcurl static and dynamic

        links curl.exe against libcurl and OpenSSL dynamically.

        This executable requires libcurl.dll and the OpenSSL DLLs

        at runtime. 

        Run 'nmake vc-ssl-zlib' to build with both ssl and zlib support.

      Microsoft / Borland style

      -------------------------

   To compile curl.nlm / libcurl.nlm you need:

   - either any gcc / nlmconv, or CodeWarrior 7 PDK 4 or later.

   - gnu make running on the platform you compile on.

   - recent Novell LibC SDK availabable from:

     http://developer.novell.com/ndk/libc.htm

   - optional zlib sources (at the moment only dynamic linking with zlib.imp); 

     sources with NetWare Makefile can be optained from:

     http://www.gknw.com/mirror/zlib/

   Set a search path to your compiler, linker and tools, if you want to have

   Set a search path to your compiler, linker and tools; if you want to have

   zlib support then set the environment var ZLIB_PATH pointing to your zlib

   sources, on Linux make sure the var OSTYPE contains the string 'linux';

   and finally type 'make netware' from the top source directory...