rename snippet vars

defaults/main.yml

@@ -15,8 +15,8 @@ nginx_sites: {}
 #       group                               Optional, for use with 'webhost' role
 #       mode                                Optional, for use with 'webhost' role
 
-
-snippet_files:
+nginx__snippet_path: 'files/nginx/snippets/'
+nginx__snippet_files:
   - 'acmetool.snippet.conf'
   - 'tls_parameters.snippet.conf'
 

tasks/nginx.yml

@@ -67,11 +67,11 @@
 - name: Copy nginx snippet files
   become: true
   copy:
-    src: 'files/nginx/snippets/{{ item }}'
+    src: '{{ nginx__snippet_path }}{{ item }}'
     dest: '/etc/nginx/snippets/{{ item }}'
     owner: root
     group: root
     mode: 'u=rw,g=r,o=r'
-  with_items: '{{ snippet_files }}'
+  with_items: '{{ nginx__snippet_files }}'
   notify:
     - systemctl reload nginx