Updated readme information from CH.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@2709 b35dd754-fafc-0310-a699-88a17e54d16e

src/plugins/contentFilter/readme.html

@@ -65,6 +65,20 @@ This plugin is configured via the "Content Filter" sidebar item located under th
 "System" tab in the Jive Messenger Admin Console.
 </p>
 
+<p>
+The default comma separated patterns are "fox,dog". This will perform a case
+sensitive match on all words containing these strings. e.g. "fox", "firefox",
+"foxy", "dog", "hotdog", "dogdays" but not "Fox", "firefoX". These simple patterns
+can be enhanced with more complex regular expressions as required e.g.:
+<ul>
+  <li>for a complete word match, add boundary checks with \b e.g. \bfox\b will match against the word "fox" and nothing else.
+  <li>for case insensitive matchs add (?i) e.g. (?i)\bfox\b will match against "fox", "Fox", "foX" etc.
+</ul>
+
+Want to know more about regular expressions in Java? This official <a href="http://java.sun.com/docs/books/tutorial/extra/regex/">tutorial</a>
+is useful.
+</p>
+
 <h2>Using the Plugin</h2>
 <p>
 After the plugin has been configured, nothing else needs to be done to use it.