Add back bug status to 2001/cheong

Once upon a time after I had put in the bugs file that there is no arg
check and it was a feature, not a bug, it was changed to bug status.
This was a very simple fix that I then made but it's not necessary
either so I have undone it to make it more like the original. Now the
only difference from the original is my fix so that it compiles with
clang. This means the bugs file was also updated as was the index.html
file and the thanks file (which also has some other fixes that are
unrelated).

bugs.md

@@ -2205,14 +2205,13 @@ file) but it appears this *also* requires i386 linux; indeed looking at the code
 it hard codes paths that are i386 specific to linux.
 
 Another point of interest is that the author provided de-obfuscated versions
-which might be of value to look at. I might do that as well but this entry is
-very likely never going to work for 64-bit linux so that's not that likely since
-there are other things that are more important.
+which might be of value to look at.
 
 If you have a fix for 64-bit systems this is welcome as an alternate version, as
 stated above. You might like to look at the otccelf version but note that it (at
 least in 64-bit linux and macOS) has compilation errors.
 
+
 ### Aside: why were there changes made if INABIAF ?
 
 This is a good question. The reason is we believe it better to fix some obvious
@@ -2226,6 +2225,16 @@ Also the supplementary program, which did not work at all, was fixed (by Cody)
 and it can be run by itself for fun in modern systems, which was not possible
 before the fixes there.
 
+<div id="2001_cheong">
+## 2001/cheong
+</div>
+
+### STATUS: INABIAF - please **DO NOT** fix
+### Source code: [2001/cheong/cheong.c](%%REPO_URL%%/2001/cheong/cheong.c)
+### Information: [2001/cheong/index.html](2001/cheong/index.html)
+
+This program will crash without an arg.
+
 
 <div id="2001_dgbeards">
 ## 2001/dgbeards