Revert "vc: remove explicit MSVC6 IDE project file and documentation"

This reverts commit 0e66d5878e.

docs/INSTALL

@@ -352,6 +352,37 @@ Win32
    at runtime.
    Run 'nmake vc-ssl-zlib' to build with both ssl and zlib support.
 
+   MSVC 6 IDE
+   ----------
+
+   A minimal VC++ 6.0 reference workspace (vc6curl.dsw) is available with the
+   source distribution archive to allow proper building of the two included
+   projects, the libcurl library and the curl tool.
+
+   1) Open the vc6curl.dsw workspace with MSVC6's IDE.
+   2) Select 'Build' from top menu.
+   3) Select 'Batch Build' from dropdown menu.
+   4) Make sure that the eight project configurations are 'checked'.
+   5) Click on the 'Build' button.
+   6) Once the eight project configurations are built you are done.
+
+   Dynamic and static libcurl libraries are built in debug and release flavours,
+   and can be located each one in its own subdirectory, DLL-Debug, DLL-Release,
+   LIB-Debug and LIB-Release, all of them below the 'lib' subdirectory.
+
+   In the same way four curl executables are created, each using its respective
+   library. The resulting curl executables are located in its own subdirectory,
+   DLL-Debug, DLL-Release, LIB-Debug and LIB-Release, below the 'src' subdir.
+
+   These reference VC++ 6.0 configurations are generated using the dynamic CRT.
+
+   Intentionally, these reference VC++ 6.0 projects and configurations don't use
+   third party libraries, such as OpenSSL or Zlib, to allow proper compilation
+   and configuration for all new users without further requirements.
+
+   If you need something more 'involved' you might adjust them for your own use,
+   or explore the world of makefiles described above 'MSVC from command line'.
+
    Borland C++ compiler
    ---------------------