Update OpenID dialog text

We want to indicate more clearly that the information that we transmit
to the third party is governed by their terms of service and privacy
policy.

lms/templates/provider_login.html

@@ -41,7 +41,7 @@
 %if error:
       <div id="login_error" class="modal-form-error" style="display: block;">${_("Email or password is incorrect.")}</div>
 %endif
-      <p>${_("Please note that we will be sending your user name, email, and full name to this third party site.")}</p>
+      <p>${_("Your username, email, and full name will be sent to {destination}, where the collection and use of this information will be governed by their terms of service and privacy policy.").format(destination=return_to)}</p>
       <label>${_("E-mail")}</label>
       <input type="text" name="email" placeholder="${_('E-mail')}" tabindex="1" autofocus="autofocus" />
       <label>${_("Password")}</label>