submission: Reorder initialization code

login_set socket paths get invalidated when
master_service_init_finish is called, so we need
to run the code that uses them before this.

src/submission/main.c

@@ -341,7 +341,6 @@ int main(int argc, char *argv[])
 	login_set.callback = login_client_connected;
 	login_set.failure_callback = login_client_failed;
 
-	master_service_init_finish(master_service);
 	master_service_set_die_callback(master_service, submission_die);
 
 	storage_service =
@@ -363,6 +362,13 @@ int main(int argc, char *argv[])
 	smtp_client_set.debug = submission_debug;
 	smtp_client = smtp_client_init(&smtp_client_set);
 
+	if (!IS_STANDALONE())
+		master_login = master_login_init(master_service, &login_set);
+
+	master_service_init_finish(master_service);
+	/* NOTE: login_set.*_socket_path are now invalid due to data stack
+	   having been freed */
+
 	/* fake that we're running, so we know if client was destroyed
 	   while handling its initial input */
 	io_loop_set_running(current_ioloop);
@@ -372,7 +378,6 @@ int main(int argc, char *argv[])
 			main_stdio_run(username);
 		} T_END;
 	} else {
-		master_login = master_login_init(master_service, &login_set);
 		io_loop_set_running(current_ioloop);
 	}