* smtp.el (smtp-via-smtp): Fix to use `smtp-authentication-type',

* smtp.el (smtp-via-smtp): Fix to use `smtp-authentication-type',
`smtp-authentication-user', `smtp-authentication-passphrase' and
`smtp-connection-type'.

* smtp.el (smtp-authentication-type): New variable.
          (smtp-authentication-user): New variable.
          (smtp-authentication-passphrase): New variable.
		  (smtp-connection-type): New variable.