* AuthProxy: Can now login with auth proxy and get a login token
* added unit tests
* renamed setting and updated docs
* AuthProxy: minor tweak
* Fixed tests and namings
* spellfix
* fix
* remove unused setting, probably from merge conflict
* fix
* Auth: change the error HTTP status codes
* Use 407 HTTP status code for incorrect credentials error
* Improve proxy auth logs
* Remove no longer needed TODO comment
Fixes#18439
* incapsulates multipleldap logic under one module
* abstracts users upsert and get logic
* changes some of the text error messages and import sort sequence
* heavily refactors the LDAP module – LDAP module now only deals with LDAP related behaviour
* integrates affected auth_proxy module and their tests
* refactoring of the auth_proxy logic
* Chore: refactor auth proxy
Introduced the helper struct for auth_proxy middleware.
Added couple unit-tests, but it seems "integration" tests already cover
most of the code paths.
Although it might be good idea to test every bit of it, hm.
Haven't refactored the extraction of the header logic that much
Fixes#16147
* Fix: make linters happy
- adds the option to use ldap groups for authorization in combination with an auth proxy
- adds an option to limit where auth proxy requests come from by configure a list of ip's
- fixes a security issue, session could be reused
