Unpack lftp-VERSION-cygwin.tar.gz in the root directory.

dns:use-fork is forced to be `no' at startup, because otherwise host
name lookups tended to hang.

For some reason close() does not shutdown sockets, I had to redefine
close function to do shutdown first. (cygwin-1.3.10)

THIS IS VERY EXPERIMENTAL. USE AT YOUR OWN RISK.