param.datafile_name instead.
(backupfilename): Removed.  All users modified to use
	param.backupfile_name instead.
(textfilename): Removed.  All users modified to use
	param.textfile_name instead.
(textbackupfilename): Removed.  All users modified to use
	param.textfile_name instead.
(TEXTBACKUPFILE_NAME): Removed.