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

1994/horton/index.html

@@ -160,7 +160,7 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <h2 id="try">Try:</h2>
 <pre><code>    ./try.sh</code></pre>
 <h2 id="alternate-code">Alternate code:</h2>
-<p>This confuses cb greatly. See <a href="horton.alt.c">horton.alt.c</a> for an unobfuscated/enhanced
+<p>This confuses cb greatly. See <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1994/horton/horton.alt.c">horton.alt.c</a> for an unobfuscated/enhanced
 version.</p>
 <h3 id="alternate-build">Alternate build:</h3>
 <pre><code>    make alt</code></pre>
@@ -187,7 +187,7 @@ of their cubic equations. Those dastardly arguments are mere coefficients,
 cogs in the wheels of the grand plot to overthrow the cubics!</p>
 <p>Oh, by the way, it uses a self-contained graphtab and frame buffer.
 It’s easily modified to graph <em>any</em> 96x160 bitmap on a dumb terminal.</p>
-<p>See the <a href="gtface.c">gtface</a> program for another example. Try:</p>
+<p>See the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1994/horton/gtface.c">gtface</a> program for another example. Try:</p>
 <pre><code>    make gtface
     ./gtface &lt; gtface.data</code></pre>
 <p>For more information, see my article</p>