Remove almost all absolute URLs for this site

In a number of cases, an absolute URL for www.ioccc.org
was replaced with a document root relative URL.

In some cases the absolute URL was removed.

Removed mirror request pages.

2020/ferguson2/index.html

@@ -162,14 +162,14 @@ Morse code the encoded message. Then those picking up on the message would note
 the Morse code, translate it to the alphabet and then input it into their Enigma
 machine configured in the same way and thus have the original message.</p>
 
-<p>The <a href="http://www.ioccc.org/1998/dorssel.hint">1998 ASCII / Morse code translator</a> entry (author Dorssel) prints the
-Morse code of text; and the <a href="http://www.ioccc.org/2014/vik/hint.text">2014 Morse audio transcoder</a> (author Vik) can be
+<p>The <a href="/1998/dorsse/dorssel.hint">1998 ASCII / Morse code translator</a> entry (author Dorssel) prints the
+Morse code of text; and the <a href="/2014/vik/hint.text">2014 Morse audio transcoder</a> (author Vik) can be
 used to allow for the actual sound of it. With my entry we can complete the
 loop!</p>
 
 <h3><a name="nathan" href="#toc">The 1992 Nathan entry</a></h3>
 
-<p>The author (Nathan) of the <a href="http://www.ioccc.org/1992/nathan.hint">1992 Worst Abuse of the Rules</a> had this to say:</p>
+<p>The author (Nathan) of the <a href="/1992/nahan/nathan.hint">1992 Worst Abuse of the Rules</a> had this to say:</p>
 
 <pre><code>This program is a hello world text encrypter/decrypter. It uses an
 enigma (I think) style encryption algorithm, where the encryption