cygwin symlink support

[Sam S. <sd...@gn...>]

Native win32 clisp supports cygwin symlinks (see w32shell.c) with the
CYGWIN=winsymlinks setting.
Alas, this is not longer the default, so someone needs to lift the
appropriate code from winsup/cygwin/path.cc and adapt it to clisp.

volunteers?

-- 
Sam Steingold (http://sds.podval.org/) on CentOS release 5.6 (Final) X 11.0.60900031
http://mideasttruth.com http://www.memritv.org http://dhimmi.com
http://ffii.org http://openvotingconsortium.org http://memri.org
Can I do it in Lisp, or would you rather wait an extra couple of months?