Fix InsecureVerifySSL config

[zhouzhuojie]

From the definition of InsecureSkipVerify:

// InsecureSkipVerify controls whether a client verifies the     
// server's certificate chain and host name.                     
// If InsecureSkipVerify is true, TLS accepts any certificate    
// presented by the server and any host name in that certificate.
// In this mode, TLS is susceptible to man-in-the-middle attacks.
// This should be used only for testing.