nginx: Add toplevel-snippets mechanism

This allows you to add snippets for toplevel nginx configuration directives that can't go into the http level.
Use this for loading modules and such.

roles/nginx/tasks/main.yml

@@ -11,8 +11,11 @@
   notify:
     - restart nginx
 
-- name: snippets directory
-  file: state=directory path=/etc/nginx/snippets owner=root group=root mode=0755
+- name: snippets directories
+  file: state=directory path=/etc/nginx/{{ item }} owner=root group=root mode=0755
+  with_items:
+    - toplevel-snippets
+    - snippets
 
 - name: copy snippets
   template: src={{ item }} dest=/etc/nginx/snippets owner=root group=root mode=0644

roles/nginx/templates/nginx.conf.j2

@@ -2,6 +2,7 @@ worker_processes  auto;
 
 load_module /usr/lib/nginx/modules/ngx_http_brotli_filter_module.so;
 load_module /usr/lib/nginx/modules/ngx_http_brotli_static_module.so;
+include toplevel-snippets/*.conf;
 
 events {
     worker_connections 2048;