Remove last references to .hint files

This changes in years.html the 2011/zucker/hint.html to
2011/zucker/README.md (at the top of the file - to do with the IOCCC
logo) and also 1998/dorssel/dorssel.hint to 1998/dorssel/dorssel.md in
years.html (which should have been done in
ccbbacb31b but was left out by accident).
As well it fixes 2004/gavin in bugs.md to refer to (in the Makefile rule
that is included) README.md.

There are still files with 'hint' in the name however. I believe these
to be correct.

bugs.md

@@ -1429,7 +1429,7 @@ gavin: gavin.c
         ${RM} -f vi
         ${CP} sh vi
         ${RM} -f fs.tar
-        ${TAR} -cvf fs.tar sh vi gavin.c gavin.hint prim
+        ${TAR} -cvf fs.tar sh vi gavin.c README.md prim
 
 gavin_clean:
         ${RM} -f sh vi kernel gavin.o

years.html

@@ -8,7 +8,9 @@
 
 <BODY TEXT="#000000">
 
-<CENTER><a HREF="2011/zucker/hint.html"><IMG ALT="IOCCC" SRC="png/ioccc.png"></a><br><FONT SIZE="1">Logo by winner <a href="2011/zucker/hint.html">Matt Zucker</a></font></CENTER><BR>
+<CENTER><a HREF="2011/zucker/README.md"><IMG ALT="IOCCC"
+	SRC="png/ioccc.png"></a><br><FONT SIZE="1">Logo by winner <a
+	    href="2011/zucker/README.md">Matt Zucker</a></font></CENTER><BR>
 <CENTER><FONT SIZE="6"><I>The International Obfuscated C Code
 Contest </I></FONT></CENTER><BR>
 
@@ -2267,7 +2269,7 @@ Contest </I></FONT></CENTER><BR>
 <UL TYPE=square>
 <LI><A HREF="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/Makefile">Makefile</A>
 <LI><A HREF="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/dorssel.c">dorssel.c</A>
-<LI><A HREF="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/dorssel.hint">dorssel.hint</A>
+<LI><A HREF="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/dorssel.md">dorssel.md</A>
 <LI><A HREF="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/README.md">README.md</A>
 </UL>
 <A NAME="1998_fanf"></A>