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.

1992/gson/.entry.json

@@ -51,7 +51,7 @@
 	},
 	{
 	    "file_path" : "1992_gson.tar.bz2",
-	    "inventory_order" : 100000,
+	    "inventory_order" : 1415926535,
 	    "OK_to_edit" : false,
 	    "display_as" : "tbz2",
 	    "display_via_github" : false,

1992/gson/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>
@@ -141,7 +142,7 @@ Location: <a href="../../location.html#FI">FI</a> - <em>Republic of Finland </em
 <!-- 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>
 <p>NOTE: we DISABLE the optimiser because having it enabled causes some invocations
 to crash in some systems.</p>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
@@ -149,9 +150,9 @@ to crash in some systems.</p>
 <pre><code>    STATUS: uses gets() - change to fgets() if possible</code></pre>
 <p>For more detailed information see <a href="../../bugs.html#1992_gson">1992 gson bugs</a>.</p>
 <h2 id="to-use">To use:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./ag word word2 word3 &lt; /path/to/dictionary</code></pre>
+<pre><code>    ./ag word word2 word3 &lt; /path/to/dictionary</code></pre>
 <h2 id="try">Try:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./try.sh</code></pre>
+<pre><code>    ./try.sh</code></pre>
 <p>This script will determine (or try and determine) where your system dictionary
 is located and assuming that it can find one it’ll use that. It checks the
 following locations though the last one is more ironic:</p>
@@ -160,7 +161,7 @@ following locations though the last one is more ironic:</p>
     /usr/ucblib/dict/words
     /dev/null                   # &lt;-- for machines with nothing to say</code></pre>
 <p>Then using the proper dictionary file it does:</p>
-<pre class="&lt;!---sh--&gt;"><code>    ./ag free software foundation       &lt; /usr/share/dict/words
+<pre><code>    ./ag free software foundation       &lt; /usr/share/dict/words
     ./ag obfuscated c contest   &lt; /usr/share/dict/words
     ./ag unix international             &lt; /usr/share/dict/words
     ./ag george bush            &lt; /usr/share/dict/words
@@ -179,7 +180,7 @@ names listed above. Run this program to find the anagrams they
 weren’t allowed to print!</p>
 <p>The author provided an obfuscated script that can be used to construct
 dictionaries which has been put in as <a href="mkdict.sh">mkdict.sh</a>. To use try:</p>
-<pre class="&lt;!---sh--&gt;"><code>    cat README.md | ./mkdict.sh &gt; words</code></pre>
+<pre><code>    cat README.md | ./mkdict.sh &gt; words</code></pre>
 <p>Then try using the program as shown above with the file <code>words</code>.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <p>The name of the game:</p>
@@ -195,7 +196,7 @@ natural language of your choice, one word on each line. If your machine doesn’
 have one already, you can make your own dictionary by concatenating a few
 hundred of your favourite Usenet articles and piping them through the following
 obfuscated shell script:</p>
-<pre class="&lt;!---sh--&gt;"><code>    #!/bin/sh
+<pre><code>    #!/bin/sh
     z=a-z];tr [A-Z\] \[$z|sed s/[\^$z[\^$z*/_/g|tr _ \\012|grep ..|sort -u</code></pre>
 <p>Using articles from alt.folklore.computers is likely to make
 a more professional-looking dictionary than rec.arts.erotica.</p>
@@ -323,7 +324,7 @@ the carries generated in incrementing <code>i</code> propagate straight across
 those bits that should remain zero. For example, the following
 program prints all those 16-bit integers that contain zeroes in all
 even bit positions:</p>
-<pre class="&lt;!---c--&gt;"><code>    main(){int i=0,s=0xAAAA;do{printf(&quot;%04x\t&quot;,i);}while(i=((i|~s)+1)&amp;s);}</code></pre>
+<pre><code>    main(){int i=0,s=0xAAAA;do{printf(&quot;%04x\t&quot;,i);}while(i=((i|~s)+1)&amp;s);}</code></pre>
 <p>AG uses a similar method but works in the opposite direction, finding
 the next lower value with zeroes in given bit positions by propagating
 borrows across those bits. Some additional adjustments are made
@@ -362,10 +363,10 @@ the word directly from standard input to standard output.</p>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/gson/gson.orig.c">gson.orig.c</a> - original source</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/gson/try.sh">try.sh</a> - how to run</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/gson/mkdict.sh">mkdict.sh</a> - tool to make the dictionary</li>
-<li><a href="1992_gson.tar.bz2">1992_gson.tar.bz2</a> - download entry tarball</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>
+<li><a href="1992_gson.tar.bz2">1992_gson.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/1992/gson/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/1992/gson/.entry.json">.entry.json</a> - description of entry in JSON</li>