reenable checking for capabilities of the test interface..

testinterfaces.sh

@@ -356,10 +356,10 @@ csuminternal()
 
 	i="$1"
 
-	#if ! hascap test "$i"; then
-	#	echo "skipping $i, test interface not capable"
-	#	continue
-	#fi
+	if ! hascap test "$i"; then
+		echo "skipping $i, test interface not capable"
+		continue
+	fi
 
 	echo "testing: $i"