<tt>-4</tt> or <tt>-6</tt> to force use
of IPv4 or IPv6, though normally this should not be needed.</p>
+ <p>Unicode support has been upgraded to <a
+ href="http://www.unicode.org/versions/Unicode5.1.0/">Unicode
+ 5.1.0</a>.</p>
+
<p>Various elements of the source code have been
rationalized.</p>