Added support for ipppd.

scripts/config.in

@@ -70,6 +70,7 @@ bool 'isdnlog' CONFIG_ISDNLOG
 if [ "$CONFIG_ISDNLOG" = "y" ] ; then
 	source isdnlog/.Config.in
 fi
+comment ''
 bool 'ipppstats' CONFIG_IPPPSTATS
 dep_bool 'xisdnload' CONFIG_XISDNLOAD $CONFIG_BUILDX11
 dep_bool 'xmonisdn' CONFIG_XMONISDN $CONFIG_BUILDX11
@@ -88,6 +89,9 @@ if [ "$CONFIG_VBOX" = "y" ]; then
 	source vbox/.Config.in
 fi
 bool 'ipppd' CONFIG_IPPPD
+if [ "$CONFIG_IPPPD" = "y" ]; then
+	source ipppd/.Config.in
+fi
 endmenu
 mainmenu_option nextcomment
 comment 'Documentation'