improve display_via_github and display_as values

Fixed some inconsistent use of display_via_github and display_as values.

2005/boutines/index.html

@@ -291,7 +291,7 @@ viewport and potentially every
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2005/boutines/boutines.orig.c">boutines.orig.c</a> - original source</li>
 <li><a href="Voronoi.png">Voronoi.png</a> - output example</li>
 <li><a href="eqn.png">eqn.png</a> - equation limit for entry</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2005/boutines/input.txt">input.txt</a> - sample input</li>
+<li><a href="input.txt">input.txt</a> - sample input</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2005/boutines/try.sh">try.sh</a> - how to run</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>