awsagent (AWS Inspector) does not send a User-Agent header

[stefansundin]

I reported it here: https://forums.aws.amazon.com/thread.jspa?messageID=887995

Feb 02 05:46:32 aws ec2-metadata-filter[887]: 2019/02/02 05:46:32 Blocked request to /latest/meta-data/instance-id from User-Agent:
Feb 02 05:46:32 aws awsagent[988]: Core/MetaDataClient.cpp:47:Failed to get resource information: latest/meta-data/instance-id from EC2 meta data client service with HttpResponseError: 400
Feb 02 05:46:32 aws awsagent[988]: Publishers/Publisher.cpp:48:Failed to read system settings file /opt/aws/awsagent/etc/system_settings.cfg with error -59, cannot retrieve aws region
Feb 02 05:46:32 aws awsagent[988]: Service/InspectorService.cpp:342:Error while reading configuration file /opt/aws/awsagent/etc/agent.cfg, agent cannot start : -59