* winsup.h (IMPLEMENT_STATUS_FLAG): New macro to define status flag

	* winsup.h (IMPLEMENT_STATUS_FLAG): New macro to define status flag
	accessor methods unambiguously.
	* fhandler.h: Use IMPLEMENT_STATUS_FLAG throughout where possible.
	* fhandler_termios.cc (fhandler_termios::tcinit): Call corrected
	accessor for initialized status flag.
	* mtinfo.h (class mtinfo_drive): Use IMPLEMENT_STATUS_FLAG throughout.
	* path.cc (fs_info::update): Remove duplicate call to flags().
	* path.h (struct fs_info): Use IMPLEMENT_STATUS_FLAG where possible.
	(path_conv::is_auto_device): Fix spacing.
	* tty.h (class tty_min): Use IMPLEMENT_STATUS_FLAG throughout.