AZL-78978

os.OpenFile(path, os.OCREATE|OEXCL) behaved differently on Unix and Windows systems when the target path was a dangling symlink. On Unix systems, OpenFile with OCREATE and OEXCL flags never follows symlinks. On Windows, when the target path was a symlink to a nonexistent location, OpenFile would create a file in that location. OpenFile now always returns an error when the OCREATE and OEXCL flags are both set and the target path is a symlink.