* API: Add reqSignedIn to router groups
* AuthN: Add fall through in context handler
* AuthN: Add IsAnonymous field
* AuthN: add priority to context aware clients
* ContextHandler: Add comment
* AuthN: Add a simple priority queue
* AuthN: Add Name to client interface
* AuthN: register clients with function
* AuthN: update mock and fake to implement interface
* AuthN: rewrite test without reflection
* AuthN: add comment
* AuthN: fix queue insert
* AuthN: rewrite tests
* AuthN: make the queue generic so we can reuse it for hooks
* ContextHandler: Add fixme for auth headers
* AuthN: remove unused variable
* AuthN: use multierror
* AuthN: write proper tests for queue
* AuthN: Add queue item that can store the value and priority
Co-authored-by: Jo <joao.guerreiro@grafana.com>
* AuthN: set up boilerplate for proxy client
* AuthN: Implement Test for proxy client
* AuthN: parse accept list in constructor
* AuthN: add proxy client interface
* AuthN: handle error
* AuthN: Implement the proxy client interface for ldap
* AuthN: change reciever name
* AuthN: add grafana as a proxy client
* AuthN: for error returned
* AuthN: add tests for grafana proxy auth
* AuthN: swap order of grafan and ldap auth
* AuthN: Parse additional proxy headers in proxy client and pass down
