boolean filter instead of True comparison

import suggestion from @edoput:
"al massimo posso capire un filtro come | bool"
FB PM 17/11/2016 00:22

roles/nginx/templates/site.j2

@@ -4,7 +4,7 @@ server {
 
 {% for key,value in item.server|dictsort if key != 'file_name' %}
     {{ key }} {{ value }};
-{% if nginx_separate_logs_per_site == True %}
+{% if nginx_separate_logs_per_site|bool %}
 	access_log {{ nginx_log_dir }}/{{ item.server.server_name }}-{{ nginx_access_log_name }};
 	error_log {{ nginx_log_dir }}/{{ item.server.server_name }}-{{ nginx_error_log_name }};
 {% endif %}