Support non-tls s3

[Roman2dot0]

Hello. For test purposes i deployed own s3 but unfortunately when i created mirror from pg to ch i got error that peerdb connect to https://<my_s3>/.

I used next env vars in docker-compose.yml

AWS_ACCESS_KEY: <access_key> AWS_SECRET_KEY: <secret_key> AWS_ENDPOINT: "http://<my_s3>" AWS_REGION: "test"

And set bucket in mirror settings in form s3://bucket