Use snprintf for safety

[rbdr/ngx_http_office_hours_filter_module] / doc / example_configuration

server {

        listen 80;

        root /var/www/blog;
        index index.html index.htm;

        server_name blog.unlimited.pizza;

        office_hours 8:30-20 10-16 closed;

        location / {
                try_files $uri $uri/ =404;
        }
}