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.

contact.html

@@ -165,22 +165,14 @@ issue</a>.</p>
 <p>Those FAQ entries will help guide you on how to make public comments
 and suggestion in the relevant places.</p>
 <p>See the above FAQ entries for more details.</p>
-<div id="mastodon">
-<h1 id="try-mastodon">Try mastodon</h1>
+<div id="try_mastodon">
+<h1 id="try-mastodon">Try Mastodon</h1>
 </div>
-<p>You may wish to follow us <a href="https://fosstodon.org/@ioccc">IOCCC on Mastodon</a>
-as we use that platform to announce things such as the opening of a new IOCCC
-as well as winning entries of the IOCCC.</p>
-<p>We no longer tweet (or whatever someone with poor impulse control calls
-posting messages on their platform), preferring to reside in the <a href="https://fediverse.info">fediverse</a> instead.</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.oeg</a> folk made the IOCCC feel welcome.
-And 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>
+<h2 id="please-follow-the-ioccc-on-mastodon">Please follow the <a href="https://fosstodon.org/@ioccc">IOCCC on Mastodon</a></h2>
+<p>We use Mastodon to make minor announcements, in addition announcing
+major events such as the opening of a new IOCCC, or who won.</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>
 <h1 id="if-you-really-need-to-send-email-the-ioccc-judges">If you really need to send Email the IOCCC judges</h1>
 <p>Did you look at the above section?</p>
 <p>If you must contact the IOCCC judges by email, then please send email to: