propagate reload_config() from app to usr to action handler

src/mgw_nat_app.erl

@@ -14,4 +14,5 @@ stop(_State) ->
 
 reload_config() ->
 	osmo_util:reload_config(),
+	mgw_nat_usr:reload_config(),
 	map_masq:config_update().

src/mgw_nat_usr.erl

@@ -23,7 +23,8 @@
 
 -behavior(gen_server).
 
--export([start_link/1, stop/0, sccp_masq_reset/0, sccp_masq_dump/0]).
+-export([start_link/1, stop/0, sccp_masq_reset/0, sccp_masq_dump/0,
+	 reload_config/0]).
 -export([init/1, handle_cast/2, handle_info/2, terminate/2]).
 
 
@@ -39,6 +40,8 @@ sccp_masq_reset() ->
 sccp_masq_dump() ->
 	gen_server:cast(?MODULE, sccp_masq_dump).
 
+reload_config() ->
+	gen_server:cast(?MODULE, reload_config).
 
 %% Callback functions of the OTP behavior