request by Scott Sanders <satan@totalsync.com>

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268818 13f79535-47bb-0310-9956-ffa450edef68

docs/ant2/requested-features.txt

@@ -330,3 +330,6 @@ V. Things we probably don't agree on.
 * Allow ant to farm out attributes and elements that are NOT in the ant 
   namespace to other components. ie hand doc: elements to the Documentation
   component or log: attributes to Log policy component etc
+
+* specify an onfail task or target that runs in case of a build
+  failure.