Add unobfuscated alt code to 2020/otterness

This code was found on the author's web page about the entry and has
been added as prog.alt.c. I added the try.alt.sh script as well.

Manifest updated and rebuilt .entry.json and index.html files.

thanks-for-help.html

@@ -4659,7 +4659,10 @@ Tolkien</a>.</p>
 <a href="2020/otterness/entertainer.mid">entertainer.mid</a> from the URLs we suggested so
 that one need not download them and to make sure they can always be obtained
 even if the domain or link goes dead.</p>
-<p>Cody also added the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/otterness/try.sh">try.sh</a> script.</p>
+<p>Cody also added the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/otterness/try.sh">try.sh</a> script and the
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/otterness/try.alt.sh">try.alt.sh</a> script for the author’s
+unobfuscated version that Cody added as
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/otterness/prog.alt.c">prog.alt.c</a>.</p>
 <div id="2020_tsoj">
 <h2 id="winning-entry-2020tsoj">Winning entry: <a href="2020/tsoj/index.html">2020/tsoj</a></h2>
 <h3 id="winning-entry-source-code-prog.c-62">Winning entry source code: <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/tsoj//prog.c">prog.c</a></h3>