+2012-11-20 Nathan Bird <nathan@acceleration.net>
+
+ * update-objects-joins - changed the default of slot from t (which
+ used to mean :deferred) to :immediate (to match the default
+ behavior of other parts of the system). It also seemed like a bad
+ default to pull all the slots that were explicitly specified to be
+ not pulled by default. This function now accepts more special
+ values (:immediate, :deferred, :all, or a list of slots). To get
+ the old behavior call with :slots :deferred.
+
+