Enable custom servers with OAuth application id in url path.

[pejotes]

Please note some providers like for example Okta allows to create custom authorisation servers like described here https://developer.okta.com/docs/concepts/auth-servers/ This allows to create custom servers for apps with separate urls based on schema. " OpenID: https://${yourOktaDomain}/oauth2//.well-known/openid-configuration OAuth: https://${yourOktaDomain}/oauth2//.well-known/oauth-authorization-server "

The change adds path component to discovery url for endpoints. Tested with generic hostname base url and this custom based.