OO-2575: better handle error during login with defective business path, fix NPE in artefact pool v1 if the portfolio v1 is disabled

OO-2402. don't try to launch a resource if there is nothing to launch, hardened the authentication dispatcher to accept manipulated urls and redirect them to the current page

OO-2248: implements a fully configurable Open ID Connect (Implicit flow) provider and make possible to collect several of them on the same OpenOLAT instance

OO-1949: remove entryUrl and replace it with businessPath, don't process business path in dispatcher if the login interceptors are visible...

OO-722,OO-1635: implements more business path in authoring environment and folder component, fix red screen

OO-1635,OO-722: refactor the ajax by iframe to use XHR, push the current business path to the browser via HTML5 push state, implements back button support via HTML5 History API...

OO-1561 replace lang parameter in pwd change and registration email with language parameter to not collide with html entity ⟨

OO-1362: make the guest login, links for guests and invitation login configurable in the administration GUI

OO-1251: return a copy of the list of enabled language to prevent concurrent modification red screens

OO-763: merge the BaseChiefController with the BaseFullWebappController to flatten the div hierarchy and minimze it

OO-798, OO-797, OO-796: update the webdav implementation based on Tomcat, make OpenOLAt work under root context, small refactoring of the dispatchers, push raw files dispatcher to its own servlet, implements Digest authentication...

OO-530,OO-537: as follow-up of the work in 8.3, remove some maps which are not really useful, remove more unused variables, remove the views and their mapping...

OO-449: refactor user session to work with identity key, make it pop, implements one to one chat, group chat, course chat, remove connect user list, refactor UserRequest to make it an interface

OO-271: refactor the user session management, move the the logic in its own manager, persist the time out values, make the admin GUI a bit better

OO-101,OO-86: fix issues with concurrent requests from the same browser on /dmz/ which generate errors concurrent logoff/login...

OO-67: login via RESt doesn't logout the standard session in OpenOLAT, remove the identities cache in UserSession which wasn't used, remove the TemporaryDispatcher