improve news.html and mastodon info

Added "2024-04-20" news update.

Fixed format for "2023-05-22" news.

Fixed bad links to `judges.html`.

Add "Jump to: top" near the bottom.

The `make gen_top_html` no longer builds `next/rules.html`
nor `next/guidelines.html`.  This is being done by
the `bin/gen-status.sh` tool and `make gen_status`.

Moved `make gen_top_html` after `make gen_status` in the top level
Makefile rules for `make www` and `make quick_www` because
`bin/gen-status.sh` uses the modification date of `news.html` (that
make gen_top_html might modify) when forming `status.json`.

Added FAQ 6.12 for "What is Mastodon and why does IOCCC use it?".

Simplified `contact.html` mastodon info to refer the above FAQ
for further mastodon information.

Changed `bin/gen-top-html.sh` VERSION from "1.4.2 2024-04-21"
to "1.4.3 2024-04-21".

The `bin/gen-status.sh` tool will build `next/rules.html` and/or
`next/guidelines.html` if they are missing or empty.

Changed `bin/gen-status.sh` VERSION from "1.3 2024-04-14"
to "1.4 2024-04-21".

Run `make gen_top_html gen_status` to perform the above.

faq.html

@@ -217,6 +217,7 @@ other inconsistencies with the original entry?</a></li>
 <li><a href="#faq6_9">6.9 - What is the current meaning of the IOCCC terms Author, Entry, and Submission?</a></li>
 <li><a href="#faq6_10">6.10 - How does someone make a change to a file and submit that change as a GitHub pull request?</a></li>
 <li><a href="#faq6_11">6.11 - Am I allowed to use IOCCC content?</a></li>
+<li><a href="#faq6_12">6.12 - What is Mastodon and why does IOCCC use it?</a></li>
 </ul>
 <h1 id="the-ioccc-faq">The IOCCC FAQ</h1>
 <div id="faq0">
@@ -2289,6 +2290,8 @@ unknown, they should use the <em>JSON null</em> as the <em>JSON value</em> of th
 For example:</p>
 <pre><code>    &quot;mastodon_url&quot; : null,</code></pre>
 <p>NOTE: The <em>JSON null</em> is <strong>NOT</strong> enclosed in quotes!</p>
+<p>See “<a href="faq.html#try_mastodon">FAQ 6.12: What is Mastodon and why does IOCCC use it?</a>” for more
+information on Mastodon.</p>
 <h5 id="github">github</h5>
 <pre><code>    &quot;github&quot; : &quot;@mame&quot;,</code></pre>
 <p>This <em>JSON member</em> holds the <a href="https://github.com">GitHub</a> handle of the author.</p>
@@ -2605,6 +2608,28 @@ IOCCC content. We use this to help ensure that we can all
 enjoy hat those working on the IOCCC have proper Attribution
 including, of course, the IOCCC winners themselves! It is designed
 to help ensure that everyone may enjoy the IOCCC.</p>
+<div id="faq6_12">
+<div id="try_mastodon">
+<h3 id="faq-6.12-what-is-mastodon-and-why-does-ioccc-use-it">FAQ 6.12: What is Mastodon and why does IOCCC use it?</h3>
+</div>
+</div>
+<p>The <a href="https://fosstodon.org/@ioccc">IOCCC uses Mastodon</a> for news updates,
+announcements, and for various other social media purposes.</p>
+<p><strong>Please follow the <a href="https://fosstodon.org/@ioccc">IOCCC on Mastodon</a></strong>.</p>
+<pre><code>    The IOCCC no longer uses twitter, or whatever that someone who appears to have poor impulse control
+    (allegedly) calls their platform these days.</code></pre>
+<p>The IOCCC prefers to reside in the <a href="https://fediverse.info">fediverse</a>.</p>
+<p><strong>For help with Mastodon</strong>:</p>
+<p>There is <a href="https://mastodon.help">help with Mastodon</a> available for
+those who might wish to <a href="https://fosstodon.org/deck/getting-started">get started with Mastodon</a>.</p>
+<p>While there are many fine Mastodon server instances out there, the <a href="../judges.html">IOCCC judges</a>
+use <a href="https://fosstodon.org/about">fosstodon.org</a> where lots of fun folk hang out,
+and topics like science, technology, <a href="https://en.wikipedia.org/wiki/Free_and_open-source_software">free and open source</a>
+have a good home. The <a href="https://fosstodon.org/@fosstodon">fosstodon.org</a> folk made the IOCCC feel welcome.</p>
+<p>While using Mastodon is free, the <a href="../judges.html">IOCCC judges</a> are pleased to
+<a href="https://hub.fosstodon.org/support/">support the Fosstodon Hub</a>.</p>
+<hr style="width:10%;text-align:left;margin-left:0">
+<p>Jump to: <a href="#">top</a></p>
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