Index: doc/spec/control-spec.txt
===================================================================
--- doc/spec/control-spec.txt   (revision 13456)
+++ doc/spec/control-spec.txt   (working copy)
@@ -161,6 +161,13 @@
   SETCONF command arrives containing a single ORBindAddress value, the new
   command's value replaces the two old values.

+  The situation may arise where it is not possible to set configuration options
+  by issuing a series of SETCONF commands because the value in one configuration
+  option is dependent on the value of another, which has not yet been set.
+  Such situations can be overcome by setting multiple configuration options with
+  a single SETCONF command (e.g. SETCONF ORPort=443 ORListenAddress=9001).
+
+
 3.2. RESETCONF

   Remove all settings for a given configuration option entirely, assign