add additional repository for modules

site.conf

@@ -28,6 +28,9 @@
 	-- OpenWRT Package Repository (IPv6 capable)
 	opkg = {
 		openwrt = 'http://openwrt.draic.info/%n/%v/%S/packages',
+		extra = {
+			modules = 'http://[fdca:ffee:ff12:a254::80]/modules/gluon-%GS-%GR/%S',
+		},
 	},
 
 	-- regulatory domain of your wifi