Changed package doc which mentioned adding filter to web.xml rather than filter chain.

core/src/main/java/org/springframework/security/wrapper/package.html

@@ -4,6 +4,6 @@ Populates a Servlet request with a new Spring Security compliant
 <code>HttpServletRequestWrapper</code>.
 
 <p>To use, simply add the <code>SecurityContextHolderAwareRequestFilter</code>
-to <code>web.xml</code>.
+to the Spring Security filter chain.
 </body>
 </html>