fix many internal links

Fixed a number of internal links that need to
go to the GitHub site.

Ran `make www` to perform the above.

2018/ciura/index.html

@@ -387,7 +387,7 @@ below for more details.</p>
 <h2 id="try">Try:</h2>
 <pre><code>    ./try.sh</code></pre>
 <h2 id="alternate-code">Alternate code:</h2>
-<p>An alternate version of this entry, <a href="prog.alt.c">prog.alt.c</a>, is provided. As
+<p>An alternate version of this entry, <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/ciura/prog.alt.c">prog.alt.c</a>, is provided. As
 mentioned in the author’s <a href="#remarks">remarks</a>, the alternate version lacks a
 useful bug fix.</p>
 <h3 id="alternate-build">Alternate build:</h3>
@@ -396,11 +396,11 @@ useful bug fix.</p>
 <p>Use <code>prog.alt</code> as you would <code>prog</code> above.</p>
 <h3 id="alternate-try">Alternate try:</h3>
 <pre><code>    ./try.alt.sh</code></pre>
-<p>Do you spot the fix by running both <a href="try.sh">try.sh</a> and
-<a href="try.alt.sh">try.alt.sh</a>?</p>
+<p>Do you spot the fix by running both <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/ciura/try.sh">try.sh</a> and
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/ciura/try.alt.sh">try.alt.sh</a>?</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>This text was processed by <code>prog</code>. You may get confused. We’re not really sure:
-<a href="prog.c">prog.c</a> wasn’t commented. Who has been thoroughly puzzled by <code>prog</code>?
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/ciura/prog.c">prog.c</a> wasn’t commented. Who has been thoroughly puzzled by <code>prog</code>?
 Also how obfuscated is <code>prog</code>? Having been written in C, how large of a
 vocabulary has it?</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
@@ -578,8 +578,8 @@ in the byte. Return <code>adverb</code>.</li>
 Return <code>abbreviation</code>.</li>
 </ul>
 <h3 id="remarks">Remarks:</h3>
-<p>The judges found a bug in the handling of contractions: <a href="prog.alt.c">prog.alt.c</a>
-outputs “foo wasn’<strong>[t bazzed]</strong>”. I fixed the bug in <a href="prog.c">prog.c</a>, making
+<p>The judges found a bug in the handling of contractions: <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/ciura/prog.alt.c">prog.alt.c</a>
+outputs “foo wasn’<strong>[t bazzed]</strong>”. I fixed the bug in <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/ciura/prog.c">prog.c</a>, making
 it output “foo <strong>[wasn’t bazzed]</strong>” instead, and took the liberty to merge
 one statement into a <code>for</code> loop inside its <code>main()</code> function.</p>
 <p>The program uses a 9,437,187-byte buffer so it probably will not run