Add task level logging to the list of requested features.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268744 13f79535-47bb-0310-9956-ffa450edef68

docs/ant2/requested-features.txt

@@ -120,3 +120,5 @@ reception
   getProperties(), an external describing file shipping with the task
   class or special javadoc comments parsed by a custom doclet.
 
+* allow build file writers to modify logging (verbosity for example)
+  on a target by target or task by task basis.