patch 9.1.0499: MS-Windows: doesn't handle symlinks properly

patch 9.1.0499: MS-Windows: doesn't handle symlinks properly

Problem:  MS-Windows: doesn't handle symlinks properly
          (Timothy Madden)
Solution: Implement lstat() on MS-Windows
          (author)

lstat() differs from stat() in how it handles symbolic links, the former
doesn't resolve the symlink while the latter does so.

Implement a simple yet effective fallback using Win32 APIs.

fixes #14933
closes: #15014

Co-authored-by: K.Takata <kentkt@csc.jp>
Signed-off-by: LemonBoy <thatlemon@gmail.com>
Signed-off-by: K.Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>