* dtable.cc (dtable::dup2): Revert previous patch.

	* dtable.cc (dtable::dup2): Revert previous patch.
	* fhandler.h: Ditto.
	(fhandler_socket::recv): Define new method.
	(fhandler_socket::send): Ditto.
	* fhandler_socket.cc (fhandler_socket::recv): New method.
	(fhandler_socket::send): Ditto.
	(fhandler_socket::read): Call fhandler_socket::recv() now.
	(fhandler_socket::write): Call fhandler_socket::send() now.
	* net.cc (class wsock_event): Move definition to wsock_event.h.
	(fdsock): Revert previous patch.
	(cygwin_recv): Move implementation to fhandler_socket::recv().
	(cygwin_send): Move implementation to fhandler_socket::send().
	* wsock_event.h: New file.