* 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
Serge Zaitsev
Karl Persson