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`.

2014/index.html

@@ -215,27 +215,25 @@ Entries of 2014 - The 23rd IOCCC</h1>
 <p><strong>Download IOCCC</strong> <a
 href="2014/ioccc.2014.tar.bz2">2014 entry source</a></p>
 <ul>
-<li><a href="2014/birken/index.html">2014/birken</a> - Best use of port
+<li><a href="birken/index.html">2014/birken</a> - Best use of port
 1701</li>
-<li><a href="2014/deak/index.html">2014/deak</a> - Most underscored
+<li><a href="deak/index.html">2014/deak</a> - Most underscored
 argument</li>
-<li><a href="2014/endoh1/index.html">2014/endoh1</a> - Most square (YODA
+<li><a href="endoh1/index.html">2014/endoh1</a> - Most square (YODA
 award)</li>
-<li><a href="2014/endoh2/index.html">2014/endoh2</a> - Best use of
+<li><a href="endoh2/index.html">2014/endoh2</a> - Best use of
 bioinformatics</li>
-<li><a href="2014/maffiodo1/index.html">2014/maffiodo1</a> - Homage to a
+<li><a href="maffiodo1/index.html">2014/maffiodo1</a> - Homage to a
 classic game</li>
-<li><a href="2014/maffiodo2/index.html">2014/maffiodo2</a> - Most
-tweetable entry</li>
-<li><a href="2014/morgan/index.html">2014/morgan</a> - Most likely to
+<li><a href="maffiodo2/index.html">2014/maffiodo2</a> - Most tweetable
+entry</li>
+<li><a href="morgan/index.html">2014/morgan</a> - Most likely to
 succeed</li>
-<li><a href="2014/sinon/index.html">2014/sinon</a> - Best choice of
+<li><a href="sinon/index.html">2014/sinon</a> - Best choice of
 optimization</li>
-<li><a href="2014/skeggs/index.html">2014/skeggs</a> - Most dynamic</li>
-<li><a href="2014/vik/index.html">2014/vik</a> - Best handling of
-beeps</li>
-<li><a href="2014/wiedijk/index.html">2014/wiedijk</a> - Most
-functional</li>
+<li><a href="skeggs/index.html">2014/skeggs</a> - Most dynamic</li>
+<li><a href="vik/index.html">2014/vik</a> - Best handling of beeps</li>
+<li><a href="wiedijk/index.html">2014/wiedijk</a> - Most functional</li>
 </ul>
 <p> <strong>Jump to:</strong> <a href="#">top</a></p>