Improve menu and link title and consistency

A few page names were changed and menu link (titles) were changed too.
By page names it means either DESCRIPTION or HEADER_2 in
bin/md2html.cfg. Although it looks better and is more consistent, there
might be one or two that can be further improved.

Naturally every html file that is markdown based was updated.

markdown.html

@@ -12,7 +12,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
 <title>The International Obfuscated C Code Contest</title>
 <link rel="icon" type="image/x-icon" href="./favicon.ico">
-<meta name="description" content="IOCCC markdown">
+<meta name="description" content="IOCCC markdown guidelines">
 <meta name="keywords" content="IOCCC, markdown">
 </head>
 
@@ -68,13 +68,13 @@
 
             <div class="outfit-font">
               <a href="./authors.html" class="sub-item-link">
-                People who have won
+                Winning Authors
               </a>
             </div>
 
             <div class="outfit-font">
               <a href="./location.html" class="sub-item-link">
-                Location of authors
+                Location of winning  authors
               </a>
             </div>
 
@@ -144,7 +144,7 @@
 
             <div class="outfit-font">
               <a href="./faq.html#fix_author" class="sub-item-link">
-                Fixing author info
+                Updating author info
               </a>
             </div>
           </div>
@@ -182,7 +182,7 @@
 
             <div class="outfit-font">
               <a href="./markdown.html" class="sub-item-link">
-                IOCCC markdown
+                IOCCC markdown guidelines
               </a>
             </div>
           </div>
@@ -228,7 +228,7 @@
             </a>
 
             <a class="mobile-submenu-item" href="./authors.html">
-              People who have won
+              Authors of winning IOCCC entries
             </a>
 
             <a class="mobile-submenu-item" href="./location.html">
@@ -363,7 +363,7 @@
 	   height=110>
   </a>
   <h1>The International Obfuscated C Code Contest</h1>
-  <h2>IOCCC markdown best practices</h2>
+  <h2>IOCCC markdown guidelines</h2>
 </div>
 
 <!-- END: this line ends content from: inc/header.default.html -->
@@ -382,7 +382,7 @@
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <!-- BEFORE: 1st line of markdown file: markdown.md -->
-<h1 id="ioccc-markdown-best-practices">IOCCC markdown best practices</h1>
+<h1 id="ioccc-markdown-guidelines">IOCCC markdown guidelines</h1>
 <p>The IOCCC makes extensive use of <a href="https://daringfireball.net/projects/markdown/">markdown</a>.
 For example, when <a href="faq.html#submit">submitting to the IOCCC</a>, we have people
 submit remarks about their entry in markdown format. Every