* filemanip.cc (struct _FILE_RENAME_INFORMATION): Remove definition.

	* filemanip.cc (struct _FILE_RENAME_INFORMATION): Remove definition.
	* io_stream_cygfile.cc (io_stream_cygfile::io_stream_cygfile): Set
	default permission for .exe files to 0755.
	(io_stream_cygfile::mklink): Try to create real hardlink first.  Add
	comment.
	* mklink2.cc (mkcyghardlink): New function to create real hardlink.
	* mklink2.h (mkcyghardlink): Declare.
	* mount.cc (from_fstab_line): Set got_usr_bin and got_usr_lib flags
	if /usr/bin and /usr/lib mount points exist in /etc/fstab.
	(add_usr_mnts): Only create mounts if corresponding got_usr_bin and
	got_usr_lib flags are not set.
	(read_mounts_nt): Initialize got_usr_bin and got_usr_lib to false.
	Always call add_usr_mnts, even if from_fstab succeeded.
	* ntdll.h: Include ddk/ntifs.h.