add nightly TLS test

.github/workflows/nightly.yml

@@ -119,10 +119,15 @@ jobs:
 
   miprtx:
     runs-on: ubuntu-latest
-    name: MIP RTX TAP
+    strategy:
+      fail-fast: false
+      matrix:
+        ssl: ["", BUILTIN]
+    name: MIP RTX TAP SSL=${{ matrix.ssl }}
     env:
       IPV6: 0
       RTX: 1
+      SSL: ${{ matrix.ssl }}
       TFLAGS: -DMQTT_HOST -DIPV6_NOROUTING -DNO_ABORT
     steps:
     - uses: actions/checkout@v5

test/mip_x_test.c

@@ -306,6 +306,7 @@ static void mqtt_fn(struct mg_connection *c, int ev, void *ev_data) {
       // close on farewell
       MG_INFO(("%lu CLOSING", c->id));
       mg_mqtt_disconnect(c, NULL);
+      c->is_draining = true;
       data->passed = true;
     } else if (mm->data.len == 21098) {
       struct mg_mqtt_opts pub_opts;