Don't finalise from signal handler

main.c

@@ -123,7 +123,8 @@ static void
 signal_cleanup(int x)
 {
   LOG(LOGS_WARN, LOGF_Main, "chronyd exiting on signal");
-  MAI_CleanupAndExit();
+  if (!initialised) exit(0);
+  SCH_QuitProgram();
 }
 
 /* ================================================== */

sched.c

@@ -558,6 +558,7 @@ SCH_MainLoop(void)
     status = select(one_highest_fd, &rd, &wr, &ex, ptv);
 
     if (status < 0) {
+      if (!need_to_exit)
         CROAK("Status < 0 after select");
     } else if (status > 0) {
       /* A file descriptor is ready to read */