agent: Make sure Release is sent when iwd exits

The main loop cannot be quit in signal handler as that would
prevent the agent.c from sending the Release command to the agent.

src/main.c

@@ -33,6 +33,14 @@
 #include "src/wiphy.h"
 #include "src/kdbus.h"
 #include "src/dbus.h"
+#include "src/agent.h"
+
+static struct l_timeout *timeout = NULL;
+
+static void main_loop_quit(struct l_timeout *timeout, void *user_data)
+{
+	l_main_quit();
+}
 
 static void signal_handler(struct l_signal *signal, uint32_t signo,
 							void *user_data)
@@ -41,7 +49,10 @@ static void signal_handler(struct l_signal *signal, uint32_t signo,
 	case SIGINT:
 	case SIGTERM:
 		l_info("Terminate");
-		l_main_quit();
+
+		agent_exit();
+
+		timeout = l_timeout_create(1, main_loop_quit, NULL, NULL);
 		break;
 	}
 }
@@ -171,6 +182,7 @@ destroy:
 
 done:
 	l_signal_remove(signal);
+	l_timeout_remove(timeout);
 
 	return exit_status;
 }

src/manager.c

@@ -132,7 +132,5 @@ bool manager_exit(struct l_dbus *dbus)
 	l_dbus_unregister_interface(dbus, IWD_MANAGER_PATH,
 					IWD_MANAGER_INTERFACE);
 
-	agent_exit();
-
 	return true;
 }