Added Boost Jam support for executing command lines longer than 2047 characters (up to 8191) characters when running on Windows XP or later OS version. Patch contributed by Franz Schnyder.
See http://support.microsoft.com/default.aspx?scid=kb;en-us;830473 for more detailed information on Windows cmd.exe shell command-line length limitations.
[SVN r47913]
Jurko Gospodnetić