docs - update BCC INSTALL section

   Borland C++ compiler

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

   compile openssl

   Ensure that your build environment is properly set up to use the compiler

   and associated tools. PATH environment variable must include the path to

   bin subdirectory of your compiler installation, eg: c:\Borland\BCC55\bin

   Make sure you include the paths to curl/include and openssl/inc32 in

   your bcc32.cnf file

   It is advisable to set environment variable BCCDIR to the base path of

   the compiler installation.

   eg : -I"c:\Bcc55\include;c:\path_curl\include;c:\path_openssl\inc32"

     set BCCDIR=c:\Borland\BCC55

   Check to make sure that all of the sources listed in lib/Makefile.b32

   are present in the /path_to_curl/lib directory. (Check the src

   directory for missing ones.)

   In order to build a plain vanilla version of curl and libcurl run the 

   following command from curl's root directory:

   Make sure the environment variable "BCCDIR" is set to the install

   location for the compiler eg : c:\Borland\BCC55

     make borland

   command line:

   make -f /path_to_curl/lib/Makefile-ssl.b32

   To build curl and libcurl with zlib and OpenSSL support set environment

   variables ZLIB_PATH and OPENSSL_PATH to the base subdirectories of the

   already built zlib and OpenSSL libraries and from curl's root directory

   run command:

   compile simplessl.c with appropriate links

     make borland-ssl-zlib

   libcurl library will be built in 'lib' subdirectory while curl tool

   is built in 'src' subdirectory. In order to use libcurl library it is

   advisable to modify compiler's configuration file bcc32.cfg located

   in c:\Borland\BCC55\bin to reflect the location of libraries include

   paths for example the '-I' line could result in something like:

     -I"c:\Borland\BCC55\include;c:\curl\include;c:\openssl\inc32"

   bcc3.cfg '-L' line could also be modified to reflect the location of

   of libcurl library resulting for example:

     -L"c:\Borland\BCC55\lib;c:\curl\lib;c:\openssl\out32"

   In order to build sample program 'simple.c' from the docs\examples

   subdirectory run following command from mentioned subdirectory:

     bcc32 simple.c libcurl.lib cw32mt.lib

   In order to build sample program simplessl.c an SSL enabled libcurl

   is required, as well as the OpenSSL libeay32.lib and ssleay32.lib

   libraries.

   c:\curl\docs\examples\> bcc32 -L c:\path_to_curl\lib\libcurl.lib

                                 -L c:\borland\bcc55\lib\psdk\ws2_32.lib

                                 -L c:\openssl\out32\libeay32.lib

                                 -L c:\openssl\out32\ssleay32.lib

                                 simplessl.c

   OTHER MSVC IDEs

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