Fix menu and various other fixes

The menu in all html pages for the FAQ was fixed to link to the step 0
(of how to enter the contest) and also it was renamed ('Enter the
IOCCC').

I also went through the most important sections of the FAQ (how to
enter and the mkiocccentry related questions) and checked the
register.html, pw-change.html and submit.html pages. It is possible I
have missed something but I think it's in pretty good shape nonetheless.

markdown.html

@@ -150,8 +150,8 @@
             </div>
 
             <div class="outfit-font">
-              <a href="./faq.html#submit" class="sub-item-link">
-                How to enter
+              <a href="./faq.html#enter" class="sub-item-link">
+                Enter the IOCCC
               </a>
             </div>
 
@@ -318,8 +318,8 @@
               Frequently Asked Questions
             </a>
 
-            <a class="mobile-submenu-item" href="./faq.html#submit">
-              How to enter
+            <a class="mobile-submenu-item" href="./faq.html#enter">
+              Enter the IOCCC
             </a>
 
             <a class="mobile-submenu-item" href="./faq.html#compiling">
@@ -431,7 +431,7 @@
 <h2 id="ioccc-markdown-guidelines-version">IOCCC Markdown guidelines version</h2>
 </div>
 <p class="leftbar">
-These <a href="markdown.html">IOCCC markdown guidelines</a> are version <strong>28.0 2024-10-25</strong>.
+These <a href="markdown.html">IOCCC markdown guidelines</a> are version <strong>28.1 2024-12-27</strong>.
 </p>
 <p><strong>IMPORTANT</strong>: Be sure to read the <a href="next/rules.html">IOCCC rules</a> and <a href="next/guidelines.html">IOCCC
 guidelines</a>.</p>
@@ -809,7 +809,10 @@ italic</em></strong>.</p>
 <pre><code>     **_this text is bold italic_**</code></pre>
 <p>or:</p>
 <pre><code>     _**this text is bold italic**_</code></pre>
-<!-- AFTER: last line of markdown file: markdown.md -->
+<p><strong>BTW</strong>: the astute reader might notice that some cases of <code>*</code> for italic might
+have slipped through. We do ask you, however, to please observe this rule, as
+best you can.
+<!-- AFTER: last line of markdown file: markdown.md --></p>
 
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