Tested <junit> with new JUnit 3.6.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268935 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/OptionalTasks/junit.html

@@ -9,7 +9,8 @@
 <p>This task runs tests from the JUnit testing framework. The latest
 version of the framework can be found at 
 <a href="http://www.junit.org">http://www.junit.org</a>.
-This task requires JUnit 3.0 or above.</p>
+This task has been tested with JUnit 3.0 up to JUnit 3.6, it won't
+work with versions before JUnit 3.0.</p>
 
 <p>Tests are defined by nested <code>test</code> or
 <code>batchtest</code> tags, see <a href="#nested">nested