fix internal links in entry index.html from 1984 thru 2012

2000/dhyang/index.html

@@ -171,18 +171,18 @@ program that generates a set of mutually reproducing programs, all of
 them with cool layout!</p>
 <p>For your enjoyment:</p>
 <ol type="1">
-<li>Compile <a href="dhyang.c">dhyang.c</a>.</li>
+<li>Compile <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/dhyang/dhyang.c">dhyang.c</a>.</li>
 <li>Run <code>./dhyang</code> and redirect output to another <code>.c</code> file.</li>
 <li>Compile that file.</li>
 <li>Repeat steps 2 and 3 until eventually the output cycles.</li>
 </ol>
-<p>To interpret the output: the <a href="dhyang.c.c">dhyang.c</a> is an image of Saitou
+<p>To interpret the output: the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/dhyang/dhyang.c.c">dhyang.c</a> is an image of Saitou
 Hajime, which eventually generates three sources files that are images of “aku
 soku zan” (sin swift slay), Saitou’s motto ;)</p>
 <p>For best viewing, set tab spaces to 8 characters, and set your
 terminal fonts to as close to square as possible. I hate to do this
 but you know, size…</p>
-<p><a href="dhyang.c">dhyang.c</a> and all its output compiles with gcc if your OS uses ASCII
+<p><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/dhyang/dhyang.c">dhyang.c</a> and all its output compiles with gcc if your OS uses ASCII
 character set. No file is included and all functions assume default <code>int</code> return
 type (a source of compile warnings).</p>
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