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.

2020/ferguson2/recode.html

@@ -362,7 +362,7 @@
 <h1 id="the-recode-configurator-documentation-and-a-fun-way-to-explore-my-2020-ioccc-enigma-simulator">The recode configurator documentation (and a fun way to explore my 2020 IOCCC Enigma simulator)</h1>
 <p>N.B. At the end of this file I have given a fun exercise that can be used to
 explore my <a href="https://www.cryptomuseum.com/crypto/enigma/index.htm">Enigma machine</a>
-<a href="prog.c">simulator</a>. I really encourage you to do this but of course you don’t
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c">simulator</a>. I really encourage you to do this but of course you don’t
 have to if you don’t wish to.</p>
 <div id="toc">
 <ul>
@@ -438,8 +438,8 @@ if you don’t give the option to read in a file for input.</p>
     Plugboard pair #09: RU
     Plugboard pair #10: VG
     1WX5AK4RE1XEHJSAPYCIZBWDQNRUVGIOCCC</code></pre>
-<p>Though you won’t find some of those strings in <a href="recode.c">recode.c</a> or
-<a href="prog.c">prog.c</a>. Yes the <code>WAR</code> for the Ringstellung (Ring settings) is an
+<p>Though you won’t find some of those strings in [recode.c]((https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c) or
+[prog.c]((https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c). Yes the <code>WAR</code> for the Ringstellung (Ring settings) is an
 amusing coincidence <em>but it really did happen!</em></p>
 <p>As for <code>-f</code> the contents would be output with the settings e.g. to pipe to
 <code>prog</code> itself (as if you redirected the file contents to the Enigma machine for
@@ -565,7 +565,7 @@ pair</a>; this can be done in
 a number of ways but two dots is one. Notice also that it’s in a different order
 than the simulator: because with the size restrictions on my entry I saved bytes
 by using the same loop where I could. It just felt more natural to have them
-grouped together in a configurator for the <a href="prog.c">simulator</a>.</p>
+grouped together in a configurator for the [simulator]((https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c).</p>
 <pre><code>    $ echo 1AA2AA3AA2ABCD..EFGHIJKLMNOPQRIOCCC | ./prog - 2&gt;/dev/null
     HQNVO
     $ echo 1AA2AA3AA2ABCD..EFGHIJKLMNOPQRIOCCC  | ./prog - 2&gt;/dev/null | echo 1AA2AA3AA2ABCD..EFGHIJKLMNOPQRHQNVO | ./prog  - 2&gt;/dev/null