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.

1998/dorssel/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>
@@ -141,14 +142,14 @@ Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em></l
 <!-- 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 all</code></pre>
+<pre><code>    make all</code></pre>
 <h2 id="to-use">To use:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./dorssel
+<pre><code>    ./dorssel
     # input some text
 
     echo text | ./dorssel</code></pre>
 <h2 id="try">Try:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./try.sh</code></pre>
+<pre><code>    ./try.sh</code></pre>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>How does the program decide which way to convert?</p>
 <p>What obsolescent feature are we talking about? (No, it’s not a
@@ -166,7 +167,7 @@ altering the behavior ?</p></li>
 <h3 id="extra-credit">Extra credit:</h3>
 <p>Try doing what the last part of the last command in <a href="try.sh">try.sh</a> suggests.
 As in, do the following:</p>
-<pre class="&lt;!---sh--&gt;"><code>    echo &quot;. -..- . .-. -.-. .. ... .
+<pre><code>    echo &quot;. -..- . .-. -.-. .. ... .
     -.-. .... .- -. --. .  - .... .  .--. .-. --- --. .-. .- --  ... ---  .. -  -.. --- . ...  -. --- -  ... .... --- ..- -&quot; | ./dorssel</code></pre>
 <p>and make the necessary adjustments.</p>
 <p>You might also want to read the <a href="dorssel.html">dorssel.html</a> file.</p>
@@ -195,21 +196,21 @@ ASCII. As far as I can tell, the program is conforming and does not
 invoke undefined behavior.</p>
 <h3 id="hints">Hints</h3>
 <p>Try:</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./dorssel &lt; dorssel.c | ./dorssel</code></pre>
+<pre><code>    ./dorssel &lt; dorssel.c | ./dorssel</code></pre>
 <p>to see what variables, numbers, and functions are used. (Does a
 better job than most C beautifiers).</p>
 <ul>
 <li>Filter your text twice (as in the previous sample) to obtain a version of your
 text that can be reversibly Morsified, i.e.</li>
 </ul>
-<pre class="&lt;!---sh--&gt;"><code>    ./dorssel &lt; dorssel.c | ./dorssel | ./dorssel | ./dorssel</code></pre>
+<pre><code>    ./dorssel &lt; dorssel.c | ./dorssel | ./dorssel | ./dorssel</code></pre>
 <p>is the same as</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./dorssel &lt; dorssel.c | ./dorssel</code></pre>
+<pre><code>    ./dorssel &lt; dorssel.c | ./dorssel</code></pre>
 <ul>
 <li>The file <a href="dorssel.md">dorssel.md</a> contains all the information needed to
 understand this program. For an obfuscated spoiler, try</li>
 </ul>
-<pre class="&lt;!---sh--&gt;"><code>    ./dorssel &lt; dorssel.md</code></pre>
+<pre><code>    ./dorssel &lt; dorssel.md</code></pre>
 <!--
 
     Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
@@ -238,10 +239,10 @@ understand this program. For an obfuscated spoiler, try</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/dorssel.orig.c">dorssel.orig.c</a> - original source</li>
 <li><a href="dorssel.html">dorssel.html</a> - author description of entry</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/dorssel/try.sh">try.sh</a> - how to run</li>
-<li><a href="1998_dorssel.tar.bz2">1998_dorssel.tar.bz2</a> - download entry tarball</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>
+<li><a href="1998_dorssel.tar.bz2">1998_dorssel.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/1998/dorssel/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/1998/dorssel/dorssel.md">dorssel.md</a> - markdown source for dorssel.html</li>