\rfcindex{}: Removed; no longer needed.

\rfcindex{}:  Removed; no longer needed.

\file{}:  Use a sans-serif font for the filename itself.

Use the fncychap.sty package for fancy chapter headings.

Replace the \maketitle command with our own format.  This is new, but it
looks a lot better than the old one.

Use \renewcommand instead of \def when extending or overriding standard LaTeX
commands.  This makes it more LaTeX-like.