Imports of registry command

PathSynopsis
github.com/docker/distribution/registryPackage registry provides the main entrypoints for running a registry.
github.com/docker/distribution/registry/auth/htpasswdPackage htpasswd provides a simple authentication scheme that checks for the user credential hash in an htpasswd formatted file in a configuration-determined location.
github.com/docker/distribution/registry/auth/sillyPackage silly provides a simple authentication scheme that checks for the existence of an Authorization header and issues access if is present and non-empty.
github.com/docker/distribution/registry/auth/token
github.com/docker/distribution/registry/proxy
github.com/docker/distribution/registry/storage/driver/azurePackage azure provides a storagedriver.StorageDriver implementation to store blobs in Microsoft Azure Blob Storage Service.
github.com/docker/distribution/registry/storage/driver/filesystem
github.com/docker/distribution/registry/storage/driver/gcsPackage gcs implements the Google Cloud Storage driver backend.
github.com/docker/distribution/registry/storage/driver/inmemory
github.com/docker/distribution/registry/storage/driver/middleware/cloudfrontPackage middleware - cloudfront wrapper for storage libs N.B. currently only works with S3, not arbitrary sites
github.com/docker/distribution/registry/storage/driver/middleware/redirect
github.com/docker/distribution/registry/storage/driver/ossPackage oss implements the Aliyun OSS Storage driver backend.
github.com/docker/distribution/registry/storage/driver/s3-awsPackage s3 provides a storagedriver.StorageDriver implementation to store blobs in Amazon S3 cloud storage.
github.com/docker/distribution/registry/storage/driver/swiftPackage swift provides a storagedriver.StorageDriver implementation to store blobs in Openstack Swift object storage.
net/http/pprofPackage pprof serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.