add rules, guidelines, fix HTML code, move compressed tarball in inventory

By changing the _inventory_order_ of the compressed tarball from
**100000** to **1415926535**, the compressed tarball will land at
the top of the secondary file list and remain still easy to find.

Updated the `manifest.numbers` spreadsheet and rebuilt
the `.entry.json` files.

Added `next/` directory to hold the next IOCCC rules and guidelines.
Added `next/README.md` that `bin/gen-top-html.sh` uses to form
the `next/index.html` file.

Added _Rules and Guidelines_ link to the sidenav bar to link to the
`next/index.html` file.

Added _IOCCC Rules_ as `next/rules.md` that `bin/gen-top-html.sh`
uses to form the `next/rules.html` file.

Added _IOCCC Guidelines_ as `next/guidelines.md` that `bin/gen-top-html.sh`
uses to form the `next/guidelines.html` file.

Changed `bin/gen-top-html.sh` VERSION from "1.2.4 2024-04-13"
to "1.3 2024-04-14".

Prevent `pandoc(1)` from interpreting the commented out language
of a markdown code block as a code class.  So a markdown such as:

````
``` <!---sh-->
...
```
````

that produced HTML of the form:

```html
<pre class="&lt;!---sh--&gt;"><code>...</code></pre>
```

will now produce HTML of the form:

```html
<pre><code>...</code></pre>
```

NOTE: Before when the language of a markdown code block
was not commented, the HTML produced by `pandoc(1)` was
oddly indented with extra whitespace on the first line
of the code block.  While commenting out the language
of the code block removed some of the odd intending,
it left a weird class in the HTML pre block that
surrounded the HTML code block.  This hack prevents
`pandoc(1)` from assigning a class to the HTML pre block.

Changed `in/md2html.sh` VERSION from "1.2.1 2024-04-13"
to "1.3 2024-04-14".

Added `make gen_sitemap` to end of both `make www` and `make
quick_www` in top level Makefile.

Ram `make www` to test under macOS and to perform the above.

**IMPORTANT NOTE**: The current `next/rules.md` and `next/guidelines.md`
are simply the 2020 IOCCC Rules and Guidelines converted into
markdown form.  There are **NOT** the Rules and Guidelines that
will be used the IOCCC MOCK, nor the next IOCCC.

TODO: Improve the `bin/gen-status.sh` tool to modify the top of the
      `next/rules.md` and `next/guidelines.md` files to keep them
      in sync with the _contest_status_ as found in `status.json`.

TODO: Improve the look and feel of the `next/rules.md` and
      `next/guidelines.md` markdown files.

2013/endoh4/index.html

@@ -88,6 +88,7 @@
     <div class="sidenav">
       <a href="../../news.html">IOCCC News</a>
       <a href="../../status.html">Contest status</a>
+      <a href="../../next/index.html">Rules and Guidelines</a>
       <a href="../../faq.html#submit">How to enter the IOCCC</a>
       <a href="../../faq.html">FAQ</a>
     </div>
@@ -141,10 +142,10 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <h2 id="to-build">To build:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    make</code></pre>
+<pre><code>    make</code></pre>
 <p>If you wish to change the size (see the <a href="#authors-remarks">Author’s remarks</a>
 below) you can do so with the <code>SIZE</code> variable. For instance you can do:</p>
-<pre class="&lt;!---sh--&gt;"><code>    make clobber SIZE=50,50 all</code></pre>
+<pre><code>    make clobber SIZE=50,50 all</code></pre>
 <p>but you can also do this directly with the <a href="endoh4.sh">endoh4.sh</a> script as
 described below.</p>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
@@ -152,22 +153,22 @@ described below.</p>
 <pre><code>    STATUS: INABIAF - please **DO NOT** fix</code></pre>
 <p>For more detailed information see <a href="../../bugs.html#2013_endoh4">2013 endoh4 bugs</a>.</p>
 <h2 id="to-use">To use:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./endoh4 &lt; file
+<pre><code>    ./endoh4 &lt; file
     ./endoh4.sh file</code></pre>
 <p>The second form is preferable as it will temporarily make the cursor invisible
 as recommended by the author. If no file is specified in the <code>./endoh4.sh</code> command
 line it will feed to the program <a href="endoh4.c">endoh4.c</a>.</p>
 <h2 id="try">Try:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./endoh4.sh cube.txt</code></pre>
+<pre><code>    ./endoh4.sh cube.txt</code></pre>
 <p>Hit ctrl-c to end the program.</p>
 <p>The author recommends the use of xterm.</p>
 <p>For an example, if you are a football/soccer fan, try:</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./endoh4.sh solids/archimedian-solid/a11-truncated-icosahedron.txt</code></pre>
+<pre><code>    ./endoh4.sh solids/archimedian-solid/a11-truncated-icosahedron.txt</code></pre>
 <p>You can provide more than one file:</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./endoh4.sh solids/archimedian-solid/a11-truncated-icosahedron.txt cube.txt</code></pre>
+<pre><code>    ./endoh4.sh solids/archimedian-solid/a11-truncated-icosahedron.txt cube.txt</code></pre>
 <p>Hit ctrl-c/intr to go to the next file.</p>
 <p>If you wish to change the size to <code>50,50</code> without passing any arg:</p>
-<pre class="&lt;!---sh--&gt;"><code>    SIZE=50,50 ./endoh4.sh</code></pre>
+<pre><code>    SIZE=50,50 ./endoh4.sh</code></pre>
 <p>Not specifying a file feeds <a href="endoh4.c">endoh4.c</a> to the program.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>This program is formatted as the net for a tetrahedron (hint: try feeding the
@@ -203,17 +204,17 @@ triangulated)</li>
 clang, and tcc. It should not trigger warnings with <code>-pedantic</code> and <code>-Wextra</code>.</p>
 <h3 id="tips">Tips</h3>
 <p>You may want to use <code>tput</code> to hide the terminal cursor.</p>
-<pre class="&lt;!---sh--&gt;"><code>    tput civis
+<pre><code>    tput civis
     ./endoh4 &lt; cube.txt
     tput cnorm</code></pre>
 <p>or</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./endoh4.sh cube.txt</code></pre>
+<pre><code>    ./endoh4.sh cube.txt</code></pre>
 <h3 id="bonuses">Bonuses</h3>
 <p>You can change the screen size. Let the aspect ratio be about 3:1.</p>
-<pre class="&lt;!---sh--&gt;"><code>    cc -DS=120,40 -o endoh4 endoh4.c</code></pre>
+<pre><code>    cc -DS=120,40 -o endoh4 endoh4.c</code></pre>
 <p>The shape of this code is the geometric net of a regular tetrahedron.
 So, try:</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./endoh4 &lt; endoh4.c # or ./endoh4.sh</code></pre>
+<pre><code>    ./endoh4 &lt; endoh4.c # or ./endoh4.sh</code></pre>
 <p>The <a href="solids/">solids/</a> directory includes various solid data:</p>
 <ul>
 <li><a href="http://en.wikipedia.org/wiki/Platonic_solid">Platonic solids</a></li>
@@ -403,10 +404,10 @@ They are copyrighted in CC BY-SA 3.0 by “User:Cyp” and “User:AndrewKepert
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/solids/trapezohedron/t06-hexagonal-trapezohedron.txt">solids/trapezohedron/t06-hexagonal-trapezohedron.txt</a> - 3D object coordinates</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/solids/trapezohedron/t08-octagonal-trapezohedron.txt">solids/trapezohedron/t08-octagonal-trapezohedron.txt</a> - 3D object coordinates</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/solids/trapezohedron/t10-decagonal-trapezohedron.txt">solids/trapezohedron/t10-decagonal-trapezohedron.txt</a> - 3D object coordinates</li>
-<li><a href="2013_endoh4.tar.bz2">2013_endoh4.tar.bz2</a> - download entry tarball</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>
+<li><a href="2013_endoh4.tar.bz2">2013_endoh4.tar.bz2</a> - download entry tarball</li>
 <li><a href="index.html">index.html</a> - this web page</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/README.md">README.md</a> - markdown source for this web page</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/.entry.json">.entry.json</a> - description of entry in JSON</li>