[nat] Use default handler for SIGINT to quit the app

openbsc/src/nat/bsc_nat.c

@@ -681,7 +681,6 @@ int main(int argc, char** argv)
 		exit(1);
 	}
 
-	signal(SIGINT, &signal_handler);
 	signal(SIGABRT, &signal_handler);
 	signal(SIGUSR1, &signal_handler);
 	signal(SIGPIPE, SIG_IGN);