ppp: add validation rules to proto handler

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 39619

package/network/services/ppp/files/ppp.sh

@@ -9,16 +9,16 @@
 }
 
 ppp_generic_init_config() {
-	proto_config_add_string "username"
-	proto_config_add_string "password"
-	proto_config_add_string "keepalive"
-	proto_config_add_int "demand"
-	proto_config_add_string "pppd_options"
-	proto_config_add_string "connect"
-	proto_config_add_string "disconnect"
-	proto_config_add_boolean "ipv6"
-	proto_config_add_boolean "authfail"
-	proto_config_add_int "mtu"
+	proto_config_add_string username
+	proto_config_add_string password
+	proto_config_add_string keepalive
+	proto_config_add_int demand
+	proto_config_add_string pppd_options
+	proto_config_add_string 'connect:file'
+	proto_config_add_string 'disconnect:file'
+	proto_config_add_boolean ipv6
+	proto_config_add_boolean authfail
+	proto_config_add_int mtu
 }
 
 ppp_generic_setup() {