to reflect the fact that Vista has blacklisted the tap0801.sys
file name due to previous compatibility issues which have now
been resolved. TAP-Win32 major/minor version number is now 9/1.
Windows installer will delete a previously installed
tap0801.sys TAP driver before installing tap0901.sys.
Added code to Windows installer to fail gracefully on 64 bit
installs until 64-bit TAP driver issues can be resolved.
Added code to Windows installer to fail gracefully on
versions of Windows which are not explicitly supported.
git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@1746 e7ae566f-a301-0410-adde-c780ea21d3b5
