Update 3003 discussion to refer to 2245

xml/issue3003.xml

@@ -101,13 +101,16 @@ That was removed by issue <iref ref="2921"/>, but issue <iref ref="2976"/>
 argues that there was no good reason to do that. Removing `uses_allocator`
 for `packaged_task` would have made sense (as proposed below for `promise`)
 but 2921 didn't do that (which is why 2976 was needed).
+If we restore that `packaged_task` constructor then we need to fix `reset()`
+as discussed in issue <iref ref="2245"/>.
 </p>
 <p>In summary:
 <ul>
 <li>Keep support for using an allocator for shared state of a `promise`.</li>
 <li>Remove `uses_allocator` specialization for `promise`.</li>
 <li>Restore support for using an allocator for the shared state of `packaged_task`.</li>
 <li>Do not restore `uses_allocator` specialization for `packaged_task`.</li>
+<li>Update `packaged_task::reset()` to deal with allocators.</li>
 </ul>
 </p>