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`.

1995/index.html

@@ -238,28 +238,23 @@ Entries of 1995 - The 12th IOCCC</h1>
 <p><strong>Download IOCCC</strong> <a
 href="1995/ioccc.1995.tar.bz2">1995 entry source</a></p>
 <ul>
-<li><a href="1995/cdua/index.html">1995/cdua</a> - Best Output</li>
-<li><a href="1995/dodsond1/index.html">1995/dodsond1</a> - Most
-Humorous</li>
-<li><a href="1995/dodsond2/index.html">1995/dodsond2</a> - Best
-Game</li>
-<li><a href="1995/esde/index.html">1995/esde</a> - Interesting
-Algorithm</li>
-<li><a href="1995/garry/index.html">1995/garry</a> - Best Utility</li>
-<li><a href="1995/heathbar/index.html">1995/heathbar</a> - Best
-Layout</li>
-<li><a href="1995/leo/index.html">1995/leo</a> - Best Use of
-Obfuscation</li>
-<li><a href="1995/makarios/index.html">1995/makarios</a> - Best Short
+<li><a href="cdua/index.html">1995/cdua</a> - Best Output</li>
+<li><a href="dodsond1/index.html">1995/dodsond1</a> - Most Humorous</li>
+<li><a href="dodsond2/index.html">1995/dodsond2</a> - Best Game</li>
+<li><a href="esde/index.html">1995/esde</a> - Interesting Algorithm</li>
+<li><a href="garry/index.html">1995/garry</a> - Best Utility</li>
+<li><a href="heathbar/index.html">1995/heathbar</a> - Best Layout</li>
+<li><a href="leo/index.html">1995/leo</a> - Best Use of Obfuscation</li>
+<li><a href="makarios/index.html">1995/makarios</a> - Best Short
 Program</li>
-<li><a href="1995/savastio/index.html">1995/savastio</a> - Most
-Obfuscated Syntax</li>
-<li><a href="1995/schnitzi/index.html">1995/schnitzi</a> - Best One
+<li><a href="savastio/index.html">1995/savastio</a> - Most Obfuscated
+Syntax</li>
+<li><a href="schnitzi/index.html">1995/schnitzi</a> - Best One
 Liner</li>
-<li><a href="1995/spinellis/index.html">1995/spinellis</a> - Abusing The
+<li><a href="spinellis/index.html">1995/spinellis</a> - Abusing The
 Rules</li>
-<li><a href="1995/vanschnitz/index.html">1995/vanschnitz</a> - Worst
-Abuse of the C Preprocessor and Most Likely to Amaze</li>
+<li><a href="vanschnitz/index.html">1995/vanschnitz</a> - Worst Abuse of
+the C Preprocessor and Most Likely to Amaze</li>
 </ul>
 <p> <strong>Jump to:</strong> <a href="#">top</a></p>