Step up Authentication

TODO:

Since version version 2.3.0rc0 the new directive OIDCUnAutzAction enables step-up authentication scenarios when combined with the following:

• add OIDCPathAuthRequestParams that is configurable on a per-path basis and use OIDCAuthRequestParams for the static per-provider value
• add OIDCPathScope that is configurable on a per-path basis and concatenate with OIDCScope as static per-provider value

Note:

• this setup can lead to infinite redirect loops
• Session Management refresh with per-path authn request params & scopes is not possible (yet)
• Apache 2.4 does the authorization-based redirect with a HTML page with a meta refresh tag;
  depending on your Apache version/environment you may need to set ErrorDocument 401 " "