nginx/php-pool: Fixed memory_limit default to avoid overwrite by roles before

roles/nginx/php-pool/defaults/main.yml

@@ -8,6 +8,6 @@ socket_directory: "{{ phpfpm_sockets_directory }}/{{ pool_name }}"
 socket: "{{ socket_directory }}/socket"
 includes: []
 env_vars: {}
-# memory_limit: 256M #optional
+memory_limit: 0 # unlimited
 
 # status_page_path: "/status" # Disabled by default

roles/nginx/php-pool/templates/pool.conf

@@ -35,6 +35,6 @@ env[{{ key }}] = {{ val | quote }}
 {% endfor %}
 
 php_admin_value[include_path] = ".:{{ includes | join(':') }}:/usr/share/php"
-{% if memory_limit is defined %}
+{% if memory_limit is defined and memory_limit %}
 php_admin_value[memory_limit] = {{ memory_limit }}
 {% endif %}