Add Forwarded header among structured log values.

Author: Bladedu

Diff for: config/conf.d/001-structured-logs.conf

@@ -1 +1 @@
-log_format structured '{"requestId": "$request_id", "status": $status, "request": "$request", "remoteAddr": "$remote_addr", "http_x_forwarded_for": "$http_x_forwarded_for", "proxy_add_x_forwarded_for": "$proxy_add_x_forwarded_for", "body_bytes_sent": $body_bytes_sent, "http_referer": "$http_referer", "http_user_agent": "$http_user_agent"}';
+log_format structured '{"requestId": "$request_id", "status": $status, "request": "$request", "remoteAddr": "$remote_addr", "http_x_forwarded_for": "$http_x_forwarded_for", "proxy_add_x_forwarded_for": "$proxy_add_x_forwarded_for", "forwarded": "http_forwarded", "body_bytes_sent": $body_bytes_sent, "http_referer": "$http_referer", "http_user_agent": "$http_user_agent"}';