+tamper-proofing saves when everyone has the source code. However
+the game still integrity-checks savefiles on resume, including an
+abort if the endianness of the restoring machine does not match that of
+the saving machine. There is a magic-cookie header on the saves so
+in theory they could be identified by programs like file(1).
+
+Save and resume filenames are stripped of leading and trailing
+whitespace before processing.
+
+A -r command-line option has been added. When it is given (with a file
+path argument) it is functionally equivalent to a RESTORE command.