MT#56374 delay thread creation until after forking

Forking to background kills already created threads, so forking must
happen first and thread creation after.

closes #1695

Change-Id: I743b890b83903d9e0b3248b032844e7e357d2307

daemon/call.c

@@ -526,9 +526,6 @@ int call_init() {
 	for (int i = 0; i < NUM_CALL_ITERATORS; i++)
 		mutex_init(&rtpe_call_iterators[i].lock);
 
-	thread_create_looper(call_timer, rtpe_config.idle_scheduling,
-			rtpe_config.idle_priority, "kill calls", 1000000);
-
 	if (mqtt_publish_scope() != MPS_NONE)
 		mqtt_timer_start(&global_mqtt_timer, NULL, NULL);
 

daemon/main.c

@@ -1113,8 +1113,6 @@ no_kernel:
 	if (!rtpe_poller_map)
 		die("poller map creation failed");
 
-	dtls_timer();
-
 	if (call_init())
 		abort();
 
@@ -1335,6 +1333,13 @@ int main(int argc, char **argv) {
 	thread_create_looper(ice_slow_timer, rtpe_config.idle_scheduling,
 			rtpe_config.idle_priority, "ICE slow", 1000000);
 
+	/* thread to close expired call */
+	thread_create_looper(call_timer, rtpe_config.idle_scheduling,
+			rtpe_config.idle_priority, "kill calls", 1000000);
+
+	/* thread to refresh DTLS certificate */
+	dtls_timer();
+
 	if (!is_addr_unspecified(&rtpe_config.redis_ep.address) && initial_rtpe_config.redis_delete_async)
 		thread_create_detach(redis_delete_async_loop, NULL, "redis async");