convert INABIAF headers in README.md to a Jargon File quote

We introduce a bit of fun, while specifying that something
is "supposed to happen".

NOTE: There is no need to change the INABIAF STATUS.  The use
there is perfectly fine.

2004/sds/README.md

@@ -52,11 +52,16 @@ diff remarks.md README.md # notice how similar they are
 ./sds < remarks.md
 ```
 
-### INABIAF - it's not a bug it's a feature! :-)
-
 The generated code will very likely crash or do something else if not given a
 proper command line. This is not a bug but a feature.
 
+This is supposed to happen.  As is written in the
+[The Jargon File](http://catb.org/jargon/html/F/feature.html):
+
+```
+That's not a bug, that's a feature.
+```
+
 
 ## Judges' remarks: