* fhandler_socket.cc: On x86_64, define u_long as __ms_u_long before
	including the windows headers.  Explain why.
	(get_inet_addr): Convert ANY address to LOOPBACK address.  Explain why.
	(fhandler_socket::evaluate_events): Forcibly set SO_ERROR socket option
	in case a connection attempt failed.  Explain why.
	(fhandler_socket::ioctl): Drop x86_64 re-definition of u_long here.
	* fhandler_procnet.cc: On x86_64, define u_long as __ms_u_long before
	including the windows headers.  Explain why.
	* net.cc: Ditto.
	* syscalls.cc (NT_TRANSACTIONAL_ERROR): Cover all status codes up to
	STATUS_TRANSACTION_NOT_ENLISTED.
* DevNotes: Add entry cgf-000026.
* fhandler.h (fhandler_console::save_top): Save top of screen coordinates.
* fhandler_console.cc (dev::save_restore): Record top of screen coordinates.
Clear entire buffer when restoring saved buffer and try to position the cursor
on the save relative place on the screen.
Merge branch 'Cygwin' into develop
Revert mounting /usr to /