Change the link to "The BSD Family Tree"

This is the second time the article is lost, it is now copied
to a safe location.

Submitted by:	Brie <brie at unixsysadmin dot org>

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

@@ -277,7 +277,7 @@
 	  <para>James Howard wrote a good explanation of the history and
 	    differences between the various projects,
 	    called <ulink
-	      url="http://www-personal.si.umich.edu/~dhogan/documentation/unix/bsd-family.html">The BSD Family Tree</ulink>
+	      url="http://www.freebsdworld.gr/freebsd/bsd-family-tree.html">The BSD Family Tree</ulink>
 	    which goes a fair way to answering this question.</para>
 	</answer>
       </qandaentry>