* gnus-start.el (): Added defvar statements to resolve compilation

	* gnus-start.el (): Added defvar statements to resolve compilation
	warnings.
	(gnus-long-file-names): New function. Isolates platform dependent
	msdos-long-file-names.
	(gnus-save-startup-file-via-temp-buffer): New variable. Provides
	option of writing directly to file.  Avoids memory exhausted
	errors when .newsrc.eld is huge.
	(gnus-save-newsrc-file): Uses new
	gnus-save-startup-file-via-temp-buffer.
	(gnus-gnus-to-quick-newsrc-format): Rewritten to write to
	standard-output.
	(gnus-display-time-event-handler): Changed to alias from a defun
	to avoid a compile-time warning when display-time-event-handler is
	not defined.