- Disabled by default due to strict rejection by auth systems.
- Fixed issue when autoloading logout URL, but not provided in
autodiscovery response.
- Added proper handling for if the logout URL contains a query string
already.
- Added extra tests to cover.
- Forced config endpoint to be used, if set as a string, instead of
autodiscovery endpoint.
Extracted logout to the login service so the logic can be shared instead
of re-implemented at each stage. For this, the SocialAuthService was
split so the driver management is in its own class, so it can be used
elsewhere without use (or circular dependencies) of the
SocialAuthService.
During review of #4467