Functions to discover OpenID
endpoints from identifiers.
Required files
uri
openid/util
openid/fetchers
openid/urinorm
openid/message
openid/yadis/discovery
openid/yadis/xrds
openid/yadis/xri
openid/yadis/services
openid/yadis/filters
openid/consumer/html_parse
openid/yadis/xrires