2 calls to openid_discovery()

openid_begin in modules/openid/openid.module: The initial step of OpenID authentication responsible for the following:
openid_complete in modules/openid/openid.module: Completes OpenID authentication by validating returned data from the OpenID Provider.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.