Add a blurb about the main reason for not including CVSup in the base

system: the fact that we would need a Modula-3 compiler to go with it.

PR:		70124
Suggested by:	Joel Dahl <joel@automatvapen.se>

en_US.ISO8859-1/books/faq/book.sgml

@@ -5059,6 +5059,30 @@ kern.timecounter.hardware: TSC -&gt; i8254</screen>
         </answer>
       </qandaentry>
 
+      <qandaentry>
+        <question id="cvsup-in-base">
+	  <para>Why is CVSup not integrated in the main FreeBSD tree?
+	  </para>
+	</question>
+
+	<answer>
+	  <para>The FreeBSD base system is designed as self-hosting - it
+	    should be possible to build the whole operating system starting
+	    with a very limited set of tools.  Thus, the actual build tools
+	    needed to compile the FreeBSD sources are bundled with the
+	    sources themselves.  This includes a C compiler (&man.gcc.1;),
+	    &man.make.1;, &man.awk.1;, and similar tools.</para>
+
+	  <para>Since CVSup is written in Modula-3, adding it to the FreeBSD
+	    base system would also require adding and maintaining a Modula-3
+	    compiler.  This would lead to both a growth in the disk space
+	    consumed by the FreeBSD sources and additional maintenance work.
+	    Thus, it is much easier for both the developers and users to
+	    keep CVSup as a separate port, which can be easily installed as
+	    a package bundled on the FreeBSD installation CD's.</para>
+	</answer>
+      </qandaentry>
+
       <qandaentry>
         <question id="ports-update">
            <para>I updated the sources, now how do I update my installed