GetCredentials queries the http.Request for X-Registry-.* headers and extracts the necessary authentication information for libpod operations.

Header builds the requested Authentication Header.

RemoveAuthfile is a convenience function that is meant to be called in a deferred statement.

XRegistryAuthHeader is the key to the encoded registry authentication configuration in an http-request header.

XRegistryConfigHeader is the key to the encoded registry authentication configuration in an http-request header.