Added nginx configuration file

cacti.nginx

@@ -0,0 +1,19 @@
+# cacti nginx configuration
+
+location = /cacti {
+    alias /usr/share/cacti/;
+}
+
+location /cacti/ {
+     root /usr/share;
+     index index.php index.html;
+
+     location ~ ^/cacti/(.+\.php)$
+     {
+         try_files $uri =404;
+         fastcgi_intercept_errors on;
+         include        fastcgi_params;
+         fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
+         fastcgi_pass   php-fpm;
+     }
+}