NETOBSERV-974 Add SASL support (#112)

go.mod

pkg/agent/agent.go

pkg/agent/config.go

pkg/agent/sasl.go

pkg/agent/tls.go

vendor/github.com/segmentio/kafka-go/sasl/plain/plain.go

vendor/github.com/segmentio/kafka-go/sasl/scram/scram.go

vendor/github.com/xdg/scram/.gitignore

vendor/github.com/xdg/scram/.travis.yml

vendor/github.com/xdg/scram/LICENSE

vendor/github.com/xdg/scram/README.md

vendor/github.com/xdg/scram/client.go

vendor/github.com/xdg/scram/client_conv.go

vendor/github.com/xdg/scram/common.go

vendor/github.com/xdg/scram/doc.go

vendor/github.com/xdg/scram/parse.go

vendor/github.com/xdg/scram/scram.go

vendor/github.com/xdg/scram/server.go

vendor/github.com/xdg/scram/server_conv.go

vendor/github.com/xdg/stringprep/.gitignore