Update strftime reference to reflect %V switch

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@21905 c90b9560-bf6c-de11-be94-00142212c4b1

functions/datetime.xml

@@ -654,6 +654,14 @@ echo strftime ("Last day in Feb 2000 is: %d", $lastday);
 	week
        </simpara>
       </listitem>
+      <listitem>
+       <simpara> 
+        %V - The  ISO 8601:1988 week number of the current year as a
+        decimal number, range 01 to 53, where week 1 is the first
+        week that has at least 4 days in the current year, and with
+        Monday as the first day of the week.
+       </simpara>
+      </listitem>
       <listitem>
        <simpara>
 	%W - week number of the current year as a decimal number,