Imports of sctscan command

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
crypto/sha256Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4.
flagPackage flag implements command-line flag parsing.
github.com/google/certificate-transparency-goPackage ct holds core types and utilities for Certificate Transparency.
github.com/google/certificate-transparency-go/clientPackage client is a CT log client implementation and contains types and code for interacting with RFC6962-compliant CT Log instances.
github.com/google/certificate-transparency-go/ctutilPackage ctutil contains utilities for Certificate Transparency.
github.com/google/certificate-transparency-go/jsonclientPackage jsonclient provides a simple client for fetching and parsing JSON CT structures from a log.
github.com/google/certificate-transparency-go/loglist3Package loglist3 allows parsing and searching of the master CT Log list.
github.com/google/certificate-transparency-go/scannerPackage scanner holds code for iterating through the contents of a CT log.
github.com/google/certificate-transparency-go/x509Package x509 parses X.509-encoded keys and certificates.
github.com/google/certificate-transparency-go/x509utilPackage x509util includes utility code for working with X.509 certificates from the x509 package.
k8s.io/klog/v2Package klog contains the following functionality:
net/httpPackage http provides HTTP client and server implementations.
timePackage time provides functionality for measuring and displaying time.