DefaultHTTPClient is the default HTTP client used across the driver.
var DefaultHTTPClient = &http.Client{ Transport: http.DefaultTransport.(*http.Transport).Clone(), }
func CloseIdleHTTPConnections(client *http.Client)
CloseIdleHTTPConnections closes any connections which were previously connected from previous requests but are now sitting idle in a "keep-alive" state. It does not interrupt any connections currently in use.
Borrowed from the Go standard library.