README document API 'privileged' command

README

@@ -598,6 +598,8 @@ The STATUS section is:
    This defaults to the cgminer version but is the value of --api-description
    if it was specified at runtime.
 
+For API version 1.2:
+
 The list of requests - a (*) means it requires privileged access - and replies are:
 
  Request       Reply Section  Details
@@ -686,6 +688,12 @@ The list of requests - a (*) means it requires privileged access - and replies a
  quit (*)      none           There is no status section but just a single "BYE|"
                               reply before cgminer quits
 
+ privileged (*)
+               none           There is no reply section just the STATUS section
+                              stating an error if you do not have privileged access
+                              to the API and success if you do have privilege
+                              The command doesn't change anything in cgminer
+
 When you enable, disable or restart a GPU, you will also get Thread messages in
 the cgminer status window