ansible-playbooks/general#85 Fix some complex when statements

tasks/main.yml

@@ -15,7 +15,7 @@
         loop_var: domain
       when: domain.protocol|default("https") == "https" and domain.letsencrypt|default(true)
 
-  when: not excluded_roles or "letsencrypt" not in excluded_roles and groups.proxyserver is not defined
+  when: (not excluded_roles or "letsencrypt" not in excluded_roles) and groups.proxyserver is not defined
 
 - block:
     - name: Ensure Download Directory