Allow to configure PHP FPM port for simple default sites

templates/php_pool.conf

@@ -6,7 +6,7 @@ chdir = /
 {% if php_fpm_socket %}
 listen = /var/run/php{{ php_version_main }}-fpm.sock
 {% else %}
-listen = 127.0.0.1:9000
+listen = 127.0.0.1:{{ php_fpm_port|default(9000) }}
 {% endif %}
 
 ; Process manager