supressed message about orphaned IO requests at exit because it

is perfectly normal for channels and therefore subscription IO
blocks to exist at exit (its the user's responsability to delete
them.

src/ca/cac.cpp

@@ -282,12 +282,9 @@ cac::~cac ()
 
     this->beaconTable.traverse ( &bhe::destroy );
 
-    // if we get here and the IO is still attached then we have a
-    // leaked io block that was not registered with a channel.
-    if ( this->ioTable.numEntriesInstalled () ) {
-        this->printf ( "CAC %u orphaned IO items?\n",
-            this->ioTable.numEntriesInstalled () );
-    }
+    // its ok for channels and subscriptions to still
+    // exist at this point. The user created them and 
+    // its his responsibility to clean them up.
 
     osiSockRelease ();