build missing HTML files for entries

Setup a simple topnav for missing HTML files for entries.

Added `bin/gen-other-html.sh` to build entry HTML files from
markdown other than README.md to index.html HTML files.

Fixed duplicate link text in `2020/ferguson1/gameplay.md`.

Improved `inc/md2html.cfg` to support building the missing HTML
files for entries.

Added `make gen_other_html` to top level Makefile.
Added `make gen_other_html` to `make quick_www` and `make www`.

Fixed inventory links for year level index.html files.
Changed `bin/output-year-index.sh` VERSION from "1.0.1 2024-02-23"
to "1.1 2024-02-27".

Added missing lines in `manifest.numbers`.  Update the affected
`.entry.json` files.

The manifest (in both `manifest.numbers` and the collection of
manifests from of all entry `.entry.json` files) now match.  Errors
from `make verify_entry_files` will now abort both `make quick_www`
and `make www` rules in the top level `Makefile`.

Changed markdown files in manifest to have an _inventory_order_ of
_2000000000_ so that the `index.html` file will usually appear at
the start of the _Secondary files_ set for the "#inventory" section
of an entry's `index.html` file.

Changed compressed tar files (files that end in _.tar.bz2_) in
manifest to have an _inventory_order_ of _100000_ so that these
files will usually appear at the end of the _Primary files_ set for
the "#inventory" section of an entry's `index.html` file.

Added 'Jump to top` link above the _Primary files_ section.
Changed `bin/output-index-inventory.sh` VERSION from "1.1.1 2024-02-23"
to "1.2 2024-02-27".

Updated HTML files to perform the above via `make www`.

2000/bmeyer/.entry.json

@@ -9,14 +9,6 @@
 	{ "author_handle" : "Bernd_Meyer" }
     ],
     "manifest" : [
-	{
-	    "file_path" : "index.html",
-	    "inventory_order" : 10,
-	    "OK_to_edit" : false,
-	    "display_as" : "html",
-	    "display_via_github" : false,
-	    "entry_text" : "entry home page"
-	},
 	{
 	    "file_path" : "bmeyer.c",
 	    "inventory_order" : 20,
@@ -81,6 +73,14 @@
 	    "display_via_github" : false,
 	    "entry_text" : "download entry source"
 	},
+	{
+	    "file_path" : "index.html",
+	    "inventory_order" : 2000000000,
+	    "OK_to_edit" : false,
+	    "display_as" : "html",
+	    "display_via_github" : false,
+	    "entry_text" : "entry home page"
+	},
 	{
 	    "file_path" : ".entry.json",
 	    "inventory_order" : 4294967295,

2000/bmeyer/index.html

@@ -372,7 +372,7 @@ this license:</p>
 <pre><code>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</code></pre>
 <p>For more information, see:
 https://creativecommons.org/licenses/by-sa/4.0/</p>
-<aside id="footnotes" class="footnotes footnotes-end-of-document"
+<section id="footnotes" class="footnotes footnotes-end-of-document"
 role="doc-endnotes">
 <hr />
 <ol>
@@ -405,7 +405,7 @@ interval is small enough to guarantee decoding within the requested
 maximum error.<a href="#fnref5" class="footnote-back"
 role="doc-backlink">↩︎</a></p></li>
 </ol>
-</aside>
+</section>
 
 <!-- END: this line ends content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 <!-- START: this line starts content for HTML phase 22 by: bin/output-index-inventory.sh via bin/md2html.sh -->
@@ -414,9 +414,9 @@ role="doc-backlink">↩︎</a></p></li>
 
 <h1 id="inventory-for-2000bmeyer"><a name="inventory"></a>Inventory for
 2000/bmeyer</h1>
+<p><a href="#top">Jump to top</a></p>
 <h2 id="primary-files">Primary files</h2>
 <ul>
-<li><a href="index.html">index.html</a> - entry home page</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bmeyer/bmeyer.c">bmeyer.c</a>
 - entry source</li>
@@ -440,6 +440,7 @@ entry source</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>
+<li><a href="index.html">index.html</a> - entry home page</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bmeyer/.entry.json">.entry.json</a>
 - description of entry in JSON</li>