network: add trusted ips

This allows the user to set trusted ips to Cloudflare or some other CDN
and have the logs have the correct IPs.

fixes #801

setup/start/nginx/nginx.conf

@@ -38,6 +38,7 @@ http {
     # zones for rate limiting
     limit_req_zone $binary_remote_addr zone=admin_login:10m rate=10r/s; # 10 request a second
 
+    include trusted.ips;
     include applications/*.conf;
     include applications/*/*.conf;
 }