Make 1998/fanf more like the original

I've added some notes to `thanks-for-help` explaining the changes, and
removed the caveat from the README since the code is now much closer
to the original.

Fun fact: T for Tony is once again the only letter not used in fanf.c

1998/fanf/README.md

@@ -26,14 +26,6 @@ Enter an expression on standard input.  To try some we have selected:
 
 ## Judges' remarks:
 
-### Historical aside:
-
-At a time the code in [fanf.c](%%REPO_URL%%/1998/fanf/fanf.c) was that of [fanf.orig.c](%%REPO_URL%%/1998/fanf/fanf.orig.c)
-but to get this to compile in modern systems it had to be translated to what you
-now see. The intermediate steps can still be performed but they might be
-different from the past. This should be kept in mind as you read the below
-remarks.
-
 This program translates lambda expressions into combinator
 expressions.  But you do not need to know Lambda Calculus to be
 impressed by this program!