main: install signal handler sooner

main.c

@@ -517,6 +517,8 @@ int main
   /* From now on, it is safe to do finalisation on exit */
   initialised = 1;
 
+  UTI_SetQuitSignalsHandler(signal_cleanup);
+
   CAM_OpenUnixSocket();
 
   if (ref_mode == REF_ModeNormal && CNF_GetInitSources() > 0) {
@@ -532,8 +534,6 @@ int main
     post_init_rtc_hook(NULL);
   }
 
-  UTI_SetQuitSignalsHandler(signal_cleanup);
-
   /* The program normally runs under control of the main loop in
      the scheduler. */
   SCH_MainLoop();