Add info wrt change in -projecthelp behaviour.

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git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@271901 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -40,6 +40,9 @@ Changes that could break older environments:
 * <propertyfile>'s <entry> element was modified to remove "never" as a value
   as its behavior was undocumented and flakey.
 
+* The -projecthelp flag now only prints out targets that include the
+  'description' attribute, unless the -verbose or -debug flag is included
+  on the Ant command line.
 
 Fixed bugs:
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