Portibility additions to ifconfig.h

Addition of reply tests

bin/tests/system/ifconfig.sh

@@ -3,7 +3,37 @@
 # Set up interface aliases for bind9 system tests.
 #
 
+sys=`../../../config.guess`
+case "$sys" in 
+    sparc-sun-solaris2.6)
+    sparc-sun-solaris2.7)
+    sparc-sun-solaris2.8)
+	type="lo0"
+	;;
+    i686-pc-linux-gnu)
+	type="lo"
+        ;;
+    i386-unknown-freebsdelf3.4)
+    i386-unknown-netbsd1.4.2)
+	type="alias"
+	;;
+esac
+
 for ns in 1 2 3 4
-do 
-   ifconfig lo0 10.53.0.$ns alias
+do
+	case "$type" in
+	    lo0)
+		ifconfig lo0:$ns 10.53.0.$ns up
+		;;
+	    lo)
+		ifconfig lo:$ns 10.50.0.$ns up
+		;;
+	    alias)
+		ifconfig lo0 10.50.0.$ns alias
+		;;
+            *)
+		echo "Don't know how to set up interface.  Giving up."
+		exit 1
+	esac
+
 done