[nginx] Add feature to add additional params to a nginx server

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

group_vars/nginx.yml

@@ -19,6 +19,7 @@ glob_nginx:
       locations:
         - filter: "/"
           params: []
+      additional_params: []
   upstreams: []
 
   auth_passwd: []

roles/nginx/templates/nginx/sites-available/service.j2

@@ -92,6 +92,12 @@ server {
     {% if server.access_log is defined %}access_log {{ server.access_log }};{% endif %}
     {% if server.error_log is defined %}error_log {{ server.error_log }};{% endif %}
 
+{% if server.additional_params is defined %}
+{% for param in server.additional_params %}
+    {{ param }};
+{% endfor %}
+{% endif %}
+
 {% if server.locations is defined %}
 {% for location in server.locations %}
     location {{ location.filter }} {