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/index.html

@@ -377,7 +377,7 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <!-- BEFORE: 1st line of markdown file: 2020/ferguson2/README.md -->
-<h2 id="to-build">To build:</h2>
+<p>https://github.com/ioccc-src/temp-test-ioccc/blob/master/## To build:</p>
 <pre><code>    make</code></pre>
 <p>The author provided alternate code that prints the output one character at a
 time to make it a bit more like the real thing in that it isn’t dumped out all
@@ -412,7 +412,7 @@ at once. See <a href="#alternate-code">Alternate code</a> below.</p>
 
     # show Enigma machine settings after selection / generation:
     ./recode -v</code></pre>
-<p><strong>NOTE</strong>: in <a href="recode.c">recode</a> no spaces between options and option arguments
+<p><strong>NOTE</strong>: in <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c">recode</a> no spaces between options and option arguments
 are allowed.</p>
 <h2 id="try">Try:</h2>
 <pre><code>    ./try.sh</code></pre>
@@ -421,7 +421,7 @@ are allowed.</p>
     echo | ./recode -v</code></pre>
 <p>do?</p>
 <h2 id="alternate-code">Alternate code:</h2>
-<p>This version, <a href="prog.alt.c">prog.alt.c</a>, writes a character at a time, sleeping
+<p>This version, <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.alt.c">prog.alt.c</a>, writes a character at a time, sleeping
 after each character, so that one can read it more easily (for longer output)
 and to make it a bit more like the real thing.</p>
 <h3 id="alternate-build">Alternate build:</h3>
@@ -440,13 +440,13 @@ out! Can you figure out why this works this way?</p>
 <p>This code is an <a href="https://youtu.be/ybkkiGtJmkM">enigma</a>. Try to decode it!</p>
 <p>There is a good deal of useful documentation that is provided with this entry:</p>
 <ul>
-<li><a href="enigma.1">enigma.1</a> - A useful man page for this entry. To render, try:</li>
+<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/enigma.1">enigma.1</a> - A useful man page for this entry. To render, try:</li>
 </ul>
 <pre><code>    man ./enigma.1</code></pre>
 <ul>
 <li><a href="recode.html">recode.html</a> (or <a href="recode.html">recode.html</a> if reading on GitHub)
 <ul>
-<li>Some useful information about <a href="recode.c">recode.c</a></li>
+<li>Some useful information about <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c">recode.c</a></li>
 </ul></li>
 <li><a href="chocolate-cake.html">chocolate-cake.html</a> (or <a href="chocolate-cake.html">chocolate-cake.html</a> if reading on GitHub)
 <ul>
@@ -456,7 +456,7 @@ out! Can you figure out why this works this way?</p>
 </ul>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <p>My remarks about my <a href="https://en.wikipedia.org/wiki/German_Army_(1935%E2%80%931945)">Heer</a> (army) and <a href="https://en.wikipedia.org/wiki/Luftwaffe">Luftwaffe</a> (air force) <a href="https://www.cryptomuseum.com/crypto/enigma/index.htm">Enigma
-machine</a> <a href="prog.c">simulator</a> for
+machine</a> <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c">simulator</a> for
 the 27th IOCCC.</p>
 <p>I want to dedicate this entry in part to the millions of poor souls that were
 lost during the tragedy that is the <a href="https://en.wikipedia.org/wiki/World_War_II">Second World
@@ -653,7 +653,7 @@ idea anyway. Neither do I know if the original transcoding is correct.</p>
 <p>(Technically above it didn’t print a newline after the output and this is how it
 is with some of the things I pasted in the other file and maybe others here
 too. Notice also how it showed the same output that my program gave it - <code>UUMMX</code>.)</p>
-<p>What about the other <a href="../../1998/dorssel/dorssel.c">Morse code entry</a>?</p>
+<p>What about the other <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/dorssel.c">Morse code entry</a>?</p>
 <pre><code>    $ echo IOCCC | ./prog | ./dorssel
     ..- ..- -- -- -..-</code></pre>
 <div id="recode">
@@ -673,7 +673,7 @@ alternatively you can specify a file to read in.</p>
 <p>It has a randomise mode and it can save/read the settings to/from a file to
 allow for duplicity (an archaic term for the state of being double but obviously
 for Enigma it has to also mean deceitful).</p>
-<p>I recommend using this in a pipeline instead of the <a href="prog.c">simulator</a> itself
+<p>I recommend using this in a pipeline instead of the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c">simulator</a> itself
 if you want to change the configuration of the simulator because it offers a
 much richer experience (and because you can reuse the configuration without
 having to type it out again every time).</p>
@@ -688,7 +688,7 @@ make it more flexible by a wrapper program.</p>
 <h3 id="a-parser-subtlety-that-could-cause-confusion">A parser subtlety that could cause confusion</h3>
 </div>
 <p>The parser is in a sense rather rudimentary but allows for both interactive and
-automatic (e.g. via the <a href="recode.c">recode</a> program) input. This does mean that
+automatic (e.g. via the <a href="(https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2recode.c)%20program">recode</a> input. This does mean that
 something like the following can happen:</p>
 <pre><code>    $ ./prog -
     Ring 1: 1AB
@@ -728,14 +728,14 @@ is buffering at play I believe but it’s useful for allowing the <code>recode</
 to easily configure the Enigma machine. In the <a href="recode.html">recode.html</a> file
 (or <a href="recode.html">recode.html</a> if reading on GitHub) file I give a hint as to how
 this could be fixed but the caveat is it would necessitate a need for rewriting
-<a href="recode.c">recode.c</a>.</p>
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c">recode.c</a>.</p>
 <p>There’s another thing to be aware of and that’s the way the ranges are enforced.
 There are five rotors which obviously are in C 0-4 but in ‘natural language’
 1-5 (they were labelled I, II, III, IV and V though).</p>
 <p>There are two
 <a href="https://www.ciphermachinesandcryptology.com/en/enigmatech.htm#Reflector">reflectors</a> and the
 same applies: in C 0-1 but in human it’s 1-2 (technically these were reflectors B and C in
-the Enigma machine which I display by name in <a href="recode.c">recode.c</a> just like
+the Enigma machine which I display by name in <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c">recode.c</a> just like
 with the rotors).</p>
 <p>For more information see <a href="recode.html">recode.html</a> (or <a href="recode.html">recode.html</a> if viewing on
 GitHub).</p>
@@ -751,7 +751,7 @@ accomplished and made use of! :)</p>
 <h3 id="on-the-source-code-layout">On the source code layout</h3>
 </div>
 <p>The layout of <a href="recode.c">recode.c</a> isn’t too significant (but see below) but I want to
-mention <a href="prog.c">prog.c</a> especially:</p>
+mention <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c">prog.c</a> especially:</p>
 <p>I did think of a more artistic layout but
 <a href="https://www.ciphermachinesandcryptology.com/en/enigmatech.htm#Reflector">reflecting</a>
 on it I think that the blankness of it can be another way of honouring all the
@@ -784,7 +784,7 @@ has some of the ways I think this entry is obfuscated. To decipher try:</p>
 <p>For the lazy <a href="obfuscation.html">obfuscation.html</a> has the deciphered version. I am afraid I’m not
 so inclined to do that for the cake recipe: the idea there is to make it a fun
 exercise that when solved unlocks a wonderful double-layered chocolate fudge
-cake recipe. But given that my <a href="../ferguson1">‘Don’t tread on me’</a> award entry
+cake recipe. But given that my <a href="../ferguson1/index.html">‘Don’t tread on me’</a> award entry
 also has the <a href="../ferguson1/chocolate-cake.html">recipe</a>
 (<a href="../ferguson1/chocolate-cake.html">ferguson1/chocolate-cake.html</a> if reading on
 GitHub), not enciphered, one might just go there instead. Still it’s a fun way
@@ -825,7 +825,7 @@ processes each letter - but with the <a href="../../2014/vik/index.html">2014 Mo
 can at least have the output played in Morse code as the Germans did; I think
 that’s really cool (I think it’s really cool even if there’s a bug in it). That
 it pays homage to that (and another) entry is a bonus here.</p></li>
-<li><p>The <a href="prog.c">simulator</a> doesn’t report errors but tries to gracefully deal
+<li><p>The <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.c">simulator</a> doesn’t report errors but tries to gracefully deal
 with them: if one chooses a value out of range it moves it into the range (if &gt;
 the max then the max, if &lt; min then the min). If invalid chars are input for the
 plugboard pairs then it’s not added to the plugboard etc.</p></li>
@@ -949,7 +949,7 @@ centre, right). To do this click the button at the top right that looks like:</p
 rotor selection ‘screen’. Then use the arrow buttons above each rotor to set
 from left to right B, B and C. After this you can type your message in the input
 field and watch the wiring of the rotors change and show the path it takes.</p>
-<p>If I made use of the Enigma code in the <a href="recode.c">recode.c</a> program I would
+<p>If I made use of the Enigma code in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c">recode.c</a> program I would
 maybe consider doing something like that but I intentionally do not use it
 there: as cool as it might be it would give a better idea of how the algorithm
 works (unless I were to make it just as obscure as I do in prog.c but that’s
@@ -1003,7 +1003,7 @@ programmers. I’m especially proud to win besides Dave Burton and Yusuke Endoh
 but Don Yang and Edward Giles too.</p>
 <p>But there are some others who I don’t remember like <a href="../../authors.html#Ilya_Kurdyukov">Ilya
 Kurdyukov</a>
-(who’s offered a lot of interesting thoughts on <a href="../ferguson1/prog.c">Snake</a> and
+(who’s offered a lot of interesting thoughts on <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson1/prog.c">Snake</a> and
 who plans to have his own version after the entries are published), <a href="../../authors.html#Nathan_Otterness">Nathan
 Otterness</a>, <a href="../../authors.html#Nicholas_Carlini">Nicholas
 Carlini</a> (your entry is an absolutely brilliant