Restore Makefile section in guidelines

Other fixes were made as well, including in the rules. More work has to
be done still.

next/rules.html

@@ -537,7 +537,7 @@ NOT</strong> exceed <strong>2503</strong>.</p>
 Use mkiocccentry</a>.</p>
 <div id="rule3">
 <div id="rule3-register">
-<h2 id="rule-3---register-for-the-contest">Rule 3 - Register for the contest</h2>
+<h2 id="rule-3---register-for-the-ioccc">Rule 3 - Register for the IOCCC</h2>
 </div>
 </div>
 <p>You <strong>MUST</strong> register, using a valid email address, in order to submit
@@ -553,7 +553,7 @@ to register! The judges are <strong>NOT</strong> responsible for delayed or lost
 email or for those who wait until the last minute to try to register!</p>
 <p>See <a href="../quick-start.html#enter">Entering the IOCCC: the bare minimum you need to know</a>.</p>
 <p>See <a href="rules.html#rule8">Rule 8 - Submitting requirements</a>.</p>
-<p>See <a href="guidelines.html#guideline-3---register">Guidelines for Rule 3 - Registering for the IOCCC</a>.</p>
+<p>See <a href="guidelines.html#guideline-3---register">Guidelines for Rule 3 - Register for the IOCCC</a>.</p>
 <div id="rule4">
 <div id="rule4-required-files">
 <h2 id="rule-4---required-files">Rule 4 - Required files</h2>
@@ -656,7 +656,7 @@ owner(s) to its use. If you submit <strong>ANY</strong> content that is owned by
 <strong>MUST</strong> detail that ownership, i.e., who owns what, and document the permission
 you obtained from them in your <code>remarks.md</code> file.</p>
 <p>You are permitted to use tools to write your code.</p>
-<p>See <a href="rules.html#rule-16-anonymous-judging">Rule 16 - Anonymous Judging</a>.</p>
+<p>See <a href="rules.html#rule16-anonymous-judging">Rule 16 - Anonymous Judging</a>.</p>
 <p>See <a href="guidelines.html#guideline-7---original-work">Guidelines for Rule 7 - Original Work</a>.</p>
 <div id="rule8">
 <div id="rule8-submitting-requirements">
@@ -796,8 +796,10 @@ variable.</p>
 <p>See FAQ on “<a href="../faq.html#makefile_details">What are the detailed recommendations for a submission Makefile?</a>”.</p>
 <p>See <a href="guidelines.html#guideline-15---building">Guidelines for Rule 15 - GNU Makefile compatibility</a>.</p>
 <div id="rule16">
+<div id="rule16-anonymous-judging">
 <h2 id="rule-16---anonymous-judging">Rule 16 - Anonymous judging</h2>
 </div>
+</div>
 <p>Your source code, data files, remarks, and program output <strong>MUST NOT</strong>
 identify the author(s) of your code (unless you are <strong>Peter Honeyman</strong>
 or pretending to be <strong>Peter Honeyman</strong>). In order to be impartial the