Add a note on installation under Win32.

 desired, GNU bc can be built with CygWin32 without change.

 Installation

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

 There's currently no real installation procedure for Win32.  There are,

 however, some suggestions:

    - do nothing.  The include files are found in the inc32/ subdirectory,

      all binaries are found in out32dll/ or out32/ depending if you built

      dynamic or static libraries.

    - do as is written in INSTALL.Win32 that comes with modssl:

	$ md c:\openssl 

	$ md c:\openssl\bin

	$ md c:\openssl\lib

	$ md c:\openssl\include

	$ md c:\openssl\include\openssl

	$ copy /b inc32\*               c:\openssl\include\openssl

	$ copy /b out32dll\ssleay32.lib c:\openssl\lib

	$ copy /b out32dll\libeay32.lib c:\openssl\lib

	$ copy /b out32dll\ssleay32.dll c:\openssl\bin

	$ copy /b out32dll\libeay32.dll c:\openssl\bin

	$ copy /b out32dll\openssl.exe  c:\openssl\bin

      Of course, you can choose another device than c:.  C: is used here

      because that's usually the first (and often only) harddisk device.

      Note: in the modssl INSTALL.Win32, p: is used rather than c:.

 Troubleshooting

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