Imports of package yaml

PathSynopsis
crypto/tlsPackage tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446.
crypto/x509Package x509 implements a subset of the X.509 standard.
github.com/coreos/etcd/clientv3clientv3 is the official Go etcd client for v3.
github.com/coreos/etcd/pkg/tlsutil
github.com/ghodss/yaml
io/ioutilPackage ioutil implements some I/O utility functions.