log_format lm_combined '$remote_addr - $upstream_http_lm_remote_custom [$time_local] '
        '"$request" $status $body_bytes_sent '
        '"$http_referer" "$http_user_agent" $upstream_http_lm_remote_custom';
log_format lm_app '$remote_addr - $upstream_http_lm_remote_user [$time_local] '
        '"$request" $status $body_bytes_sent '
        '"$http_referer" "$http_user_agent" $upstream_http_lm_remote_custom';