Log Message:
Here are the most important changes in MIMEDefang 2.74:

* A new action_add_entity function has been added.
* Deprecated defined(@array) construct has been removed.
* New load1 md-mx-ctrl command summarizes load in a more useful format than load
* watch-multiple-mimedefangs.tcl has been overhauled.
* Various other bugfixes and documentation cleanups.